| **DERIVATIVES (As Restated)**                                           | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          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| **Derivative Instruments and Hedging Activities Disclosure [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  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| DERIVATIVES                                                             | NOTE 11. DERIVATIVES (As Restated)GeneralThe Company uses derivative financial instruments primarily to help manage exposure to interest rate, foreign exchange, equity and credit risk, as well as to reduce the effects that changes in interest rates may have on net income, the fair value of assets and liabilities, and cash flows. The Company also enters into derivatives with customers to facilitate their risk management activities. The Company uses derivative financial instruments as risk management tools and not for speculative trading purposes. The fair value of all derivative balances is recorded within Other assets and Other liabilities on the Condensed Consolidated Balance Sheet. See Note 16 for discussion of the valuation methodology for derivative instruments. Derivatives represent contracts between parties that usually require little or no initial net investment and result in one party delivering cash or another type of asset to the other party based on a notional amount and an underlying as specified in the contract. Derivative transactions are often measured in terms of notional amount, but this amount is generally not exchanged and is not recorded on the balance sheet. The notional amount is the basis to which the underlying is applied to determine required payments under the derivative contract. The underlying is a referenced interest rate (commonly Overnight Indexed Swap ("OIS") or LIBOR), security price, credit spread or other index. Derivative balances are presented on a gross basis before taking into consideration the effects of legally enforceable master netting agreements. Through the Company’s capital markets and mortgage banking activities, it is subject to price risk. The Company employs various tools to measure and manage price risk in its portfolios. In addition, the Board of Directors has established certain limits relative to positions and activities. The level of price risk exposure at any given time depends on the market environment and expectations of future price and market movements and will vary from period to period. To qualify for hedge accounting, the Company was required to designate SCUSA’s derivatives as accounting hedges on or after the Change in Control date. The Company designated certain of SCUSA’s derivatives as accounting hedges effective April 1, 2014.NOTE 11. DERIVATIVES (As Restated) (continued)Credit Risk Contingent FeaturesThe Company has entered into certain derivative contracts that require the posting of collateral to counterparties when these contracts are in a net liability position. The amount of collateral to be posted is based on the amount of the net liability and thresholds generally related to the Company's long-term senior unsecured credit ratings. In a limited number of instances, counterparties also have the right to terminate their International Swaps and Derivatives Association, Inc. ("ISDA") master agreements if the Company's ratings fall below investment grade. As of September 30, 2015, derivatives in this category had a fair value of $32.5 million. The credit ratings of the Bank and SHUSA are currently considered investment grade. The Bank estimates a further 1- or 2- notch downgrade by either Standard & Poor's or Moody's would require the Bank to post up to an additional $3.5 million or $5.5 million of collateral, respectively, to comply with existing derivative agreements. As of September 30, 2015 and December 31, 2014, the aggregate fair value of all derivative contracts with credit risk contingent features (i.e. those containing collateral posting or termination provisions based on the Company's ratings) that were in a net liability position totaled $145.2 million and $133.2 million, respectively. The Company had $120.6 million and $127.6 million in cash and securities collateral posted to cover those positions as of September 30, 2015 and December 31, 2014, respectively.Fair Value HedgesThe Company enters into cross-currency swaps to hedge its foreign currency exchange risk on certain Euro-denominated investments. The Company also entered into interest rate swaps to hedge the interest rate risk on certain fixed rate investments. These derivatives are designated as fair value hedges at inception. The Company includes all components of each derivative's gain or loss in the assessment of hedge effectiveness. The earnings impact of the ineffective portion of these hedges was not material for the three-month and nine-month periods endedSeptember 30, 2015 or September 30, 2014. The last of the hedges is scheduled to expire in June 2020.Cash Flow HedgesManagement uses derivative instruments, which are designated as hedges, to mitigate the impact of interest rate movements on the fair value of certain liabilities, assets and on highly probable forecasted cash flows. These instruments primarily include interest rate swaps that have underlying interest rates based on key benchmark indices and forward sale or purchase commitments. The nature and volume of the derivative instruments used to manage interest rate risk depend on the level and type of assets and liabilities on the balance sheet and the risk management strategies for the current and anticipated interest rate environment.Interest rate swaps are generally used to convert fixed-rate assets and liabilities to variable rate assets and liabilities and vice versa. The Company utilizes interest rate swaps that have a high degree of correlation to the related financial instrument.The last of the hedges is scheduled to expire in December 2030. The Company includes all components of each derivative's gain or loss in the assessment of hedge effectiveness. The earnings impact of the ineffective portion of these hedges was not material for the three-month and nine-month periods endedSeptember 30, 2015 or September 30, 2014. As of September 30, 2015, the Company expects approximately $1.4 million of gross losses recorded in accumulated other comprehensive income to be reclassified to earnings during the subsequent twelve months as the future cash flows occur. NOTE 11. DERIVATIVES (As Restated) (continued)Derivatives Designated in Hedge Relationships – Notional and Fair Values Derivatives designated as accounting hedges at September 30, 2015 and December 31, 2014 included: NotionalAmount Asset Liability Weighted Average ReceiveRate Weighted Average PayRate Weighted Average  Life(Years) (dollars in thousands)September 30, 2015           Fair value hedges:           Cross-currency swaps$16,757 $3,555 $309 4.76% 4.75% 0.36Interest rate swaps318,000 153 6,136 1.00% 2.29% 3.75Cash flow hedges:           Pay fixed — receive floating interest rate swaps10,751,056 — 71,178 0.20% 1.09% 3.12Total$11,085,813 $3,708 $77,623 0.23% 1.13% 3.13            December 31, 2014           Fair Value hedges:           Cross-currency swaps$18,230 $2,711 $980 4.76% 4.75% 1.11    Interest rate swaps257,000 232 779 0.90% 2.38% 4.33Cash flow hedges:           Pay fixed — receive floating interest rate swaps10,086,103 7,619 20,552 0.17% 1.11% 3.02Total$10,361,333 $10,562 $22,311 0.19% 1.14% 3.05See Note 13 for detail of the amounts included in accumulated other comprehensive income related to derivatives activity.Other Derivative ActivitiesThe Company also enters into derivatives that are not designated as accounting hedges under GAAP. The majority of these derivatives are customer-related derivatives relating to foreign exchange and lending arrangements. In addition, derivatives are used to manage risks related to residential and commercial mortgage banking and investing activities. Although these derivatives are used to hedge risk and are considered economic hedges, they are not designated as accounting hedges because the contracts they are hedging are typically also carried at fair value on the balance sheet, resulting in generally symmetrical accounting treatment for both the hedging instrument and the hedged item.Mortgage Banking Derivatives The Company's derivatives portfolio includes mortgage banking interest rate lock commitments, forward sale commitments and interest rate swaps. As part of its overall business strategy, the Bank originates fixed-rate residential mortgages. It sells a portion of this production to the FHLMC, FNMA, and private investors. The Company uses forward sales as a means of hedging against the economic impact of changes in interest rates on the mortgages that are originated for sale and on interest rate lock commitments.The Company typically retains the servicing rights related to residential mortgage loans that are sold. Residential MSRs are accounted for at fair value. As deemed appropriate, the Company economically hedges MSRs using interest rate swaps and forward contracts to purchase MBS.NOTE 11. DERIVATIVES (As Restated) (continued)Customer-related derivatives The Company offers derivatives to its customers in connection with their risk management needs. These financial derivative transactions primarily consist of interest rate swaps, caps, floors and foreign exchange contracts. Risk exposure from customer positions is managed through transactions with other dealers, including Santander.Other derivative activities The Company uses foreign exchange contracts to manage the foreign exchange risk associated with certain foreign currency-denominated assets and liabilities. Foreign exchange contracts, which include spot and forward contracts as well as cross-currency swaps, represent agreements to exchange the currency of one country for the currency of another country at an agreed-upon price on an agreed-upon settlement date. Exposure to gains and losses on these contracts will increase or decrease over their respective lives as currency exchange and interest rates fluctuate.In March 2014, SCUSA entered into a financing arrangement with a third party under which SCUSA pledged certain bonds retained in its own securitizations in exchange for approximately $251 million in cash. In conjunction with this financing arrangement, SCUSA entered into a total return swap related to the bonds as an effective avenue to monetize SCUSA’s retained bonds as a source of financing. This arrangement matured and was terminated in May 2015. Other derivative instruments primarily include forward contracts related to certain investment securities sales, an OIS, a total return swap on Visa, Inc. Class B common shares, and equity options, which manage the Company's market risk associated with certain investments and customer deposit products. NOTE 11. DERIVATIVES (As Restated) (continued)Derivatives Not Designated in Hedge Relationships – Notional and Fair Values Other derivative activities at September 30, 2015 and December 31, 2014 included: Notional Asset derivativesFair value Liability derivativesFair value September 30, 2015 December 31, 2014 September 30, 2015 December 31, 2014 September 30, 2015 December 31, 2014   (in thousands)Mortgage banking derivatives:           Forward commitments to sell loans$482,207 $328,757 $— $— $4,200 $2,424Interest rate lock commitments248,375 163,013 5,480 3,063 — —Mortgage servicing435,000 469,000 3,684 7,432 2,399 7,448Total mortgage banking risk management1,165,582 960,770 9,164 10,495 6,599 9,872            Customer related derivatives:           Swaps receive fixed8,624,004 7,927,522 300,848 213,415 1,194 4,343Swaps pay fixed8,749,748 7,944,247 3,306 13,361 267,923 186,732Other2,983,761 1,670,696 44,899 62,464 43,931 61,880Total customer related derivatives20,357,513 17,542,465 349,053 289,240 313,048 252,955            Other derivative activities:           Foreign exchange contracts2,136,160 1,152,125 29,413 20,033 28,743 17,390Interest rate swap agreements2,833,000 3,231,000 — 535 12,743 12,743Interest rate cap agreements9,211,000 7,541,385 24,451 49,762 — —Options for interest rate cap agreements9,211,000 7,541,385 — — 24,462 49,806Total return settlement1,404,726 1,404,726 — — 53,322 48,893Other822,534 646,321 8,635 6,543 11,931 9,914Total$47,141,515 $40,020,177 $420,716 $376,608 $450,848 $401,573SCUSA is the holder of a warrant that gives it the right, if certain vesting conditions are satisfied, to purchase additional shares in a company in which it has a cost method investment. This warrant was issued in 2012 and is carried at its estimated fair value of zero at September 30, 2015.NOTE 11. DERIVATIVES (As Restated) (continued)Gains (Losses) on All DerivativesThe following Condensed Consolidated Statement of Operations line items were impacted by the Company’s derivative activities for the three-month and nine-month periods endedSeptember 30, 2015 and 2014, respectively:    Three-Month PeriodEnded September 30,  Nine-Month PeriodEnded September 30,Derivative Activity(1) Accounts 2015 2014 2015 2014    (in thousands)Fair value hedges:          Cross-currency swaps Miscellaneous income immaterial immaterial $110 $774Interest rate swaps Miscellaneous income (3,985) 1,731 (5,437) 978Cash flow hedges:          Pay fixed-receive variable interestrate swaps Net interest income (1,775) (13,469) (9,957) (40,936)Other derivative activities:          Forward commitments to sell loans Mortgage banking income (10,711) 2,490 (1,776) (2,762)Interest rate lock commitments Mortgage banking income 3,595 (2,027) 2,417 1,518Mortgage servicing Mortgage banking income 11,736 1,032 1,302 (4,100)Customer related derivatives Miscellaneous income (1,251) 3,280 (179) 6,941Foreign exchange Miscellaneous income (109) 1,794 (1,973) 1,302SCUSA derivatives Miscellaneous income (3,746) 9,130 711 27,269 Net interest income 21,093 (971) 58,453 (4,951) Other administrative expenses 3,836 (1,290) (10,197) (4,447)Other Miscellaneous income (1,649) 580 (2,107) (729)(1) - Gains are disclosed as positive numbers while losses are shown as a negative number regardless of the line item being affected.Disclosures about Offsetting Assets and LiabilitiesThe Company enters into legally enforceable master netting agreements, which reduce risk by permitting netting of transactions with the same counterparty on the occurrence of certain events. A master netting agreement allows two counterparties the ability to net-settle amounts under all contracts, including any related collateral posted, through a single payment and in a single currency. The right to offset and certain terms regarding the collateral process, such as valuation, credit events and settlement, are contained in the ISDA master agreement. The Company's financial instruments, including resell and repurchase agreements, securities lending arrangements, derivatives and cash collateral, may be eligible for offset on its Condensed Consolidated Balance Sheet. NOTE 11. DERIVATIVES (As Restated) (continued)Information about financial assets and liabilities that are eligible for offset on the Condensed Consolidated Balance Sheet as of September 30, 2015 and December 31, 2014, respectively, is presented in the following tables:  Offsetting of Financial Assets         Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet  Gross Amounts of Recognized Assets Gross Amounts Offset in the Condensed Consolidated Balance Sheet Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheet Financial Instruments Cash Collateral Received Net Amount  (in thousands)September 30, 2015            Fair value hedges $3,708 $— $3,708 $— $— $3,708Cash flow hedges — — — — — —Other derivative activities(1) 415,236 9,015 406,221 8,027 45,306 352,888Total derivatives subject to a master netting arrangement or similar arrangement 418,944 9,015 409,929 8,027 45,306 356,596Total derivatives not subject to a master netting arrangement or similar arrangement(2) 5,480 — 5,480 — — 5,480Total Derivative Assets $424,424 $9,015 $415,409 $8,027 $45,306 $362,076             Total Financial Assets  $424,424 $9,015 $415,409 $8,027 $45,306 $362,076             December 31, 2014            Fair value hedges $2,943 $— $2,943 $— $— $2,943Cash flow hedges 7,619 — 7,619 — — 7,619Other derivative activities(1) 373,545 21,109 352,436 10,020 5,940 336,476Total derivatives subject to a master netting arrangement or similar arrangement 384,107 21,109 362,998 10,020 5,940 347,038Total derivatives not subject to a master netting arrangement or similar arrangement(2) 3,063 — 3,063 — — 3,063Total Derivative Assets $387,170 $21,109 $366,061 $10,020 $5,940 $350,101             Total Financial Assets  $387,170 $21,109 $366,061 $10,020 $5,940 $350,101(1)Includes customer-related and other derivatives.(2)Includes mortgage banking derivatives.NOTE 11. DERIVATIVES (As Restated) (continued)  Offsetting of Financial Liabilities        Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet  Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Condensed Consolidated Balance Sheet Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet Financial Instruments Cash Collateral Pledged Net Amount  (in thousands)September 30, 2015            Fair value hedges $6,445 $— $6,445 $114 $12,703 $(6,372)Cash flow hedges 71,178  71,178 — 79,437 (8,259)Other derivative activities(1) 397,158 102,934 294,224 8,016 218,906 67,302Total derivatives subject to a master netting arrangement or similar arrangement 474,781 102,934 371,847 8,130 311,046 52,671Total derivatives not subject to a master netting arrangement or similar arrangement(2) 53,690 — 53,690 — — 53,690Total Derivative Liabilities  $528,471 $102,934 $425,537 $8,130 $311,046 $106,361             Total Financial Liabilities $528,471 $102,934 $425,537 $8,130 $311,046 $106,361             December 31, 2014            Fair value hedges $1,759 $— $1,759 $65 $5,589 $(3,895)Cash flow hedges 20,552 — 20,552 7,341 16,797 (3,586)Other derivative activities(1) 350,863 21,109 329,754 49,318 198,103 82,333Total derivatives subject to a master netting arrangement or similar arrangement 373,174 21,109 352,065 56,724 220,489 74,852Total derivatives not subject to a master netting arrangement or similar arrangement(2) 50,710 — 50,710 — 1,736 48,974Total Derivative Liabilities  $423,884 $21,109 $402,775 $56,724 $222,225 $123,826             Total Financial Liabilities $423,884 $21,109 $402,775 $56,724 $222,225 $123,826(1)Includes customer-related and other derivatives(2)Includes mortgage banking derivatives |

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No definition available.
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| - Definition
The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.
+ References
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