| **DERIVATIVES (Offsetting of Financial Liabilities) (Details) - USD ($) $ in Thousands**                                                                                            | Dec. 31, 2015 | Dec. 31, 2014 |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------|---------------|
| **Offsetting Liabilities [Line Items]**                                                                                                                                             |          |          |
| Gross Amounts of Recognized Liabilities                                                                                                                                             | $ 344,441     | $ 373,174     |
| Gross Amounts Offset in the Consolidated Balance Sheet                                                                                                                              | 116,779       | 21,109        |
| Net Amounts of Liabilities Presented in the Consolidated Balance Sheet                                                                                                              | 227,662       | 352,065       |
| Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Financial Instruments                                                                                         | 4,352         | 56,724        |
| Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Pledged                                                                                       | 219,250       | 220,489       |
| Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount                                                                                                    | 4,060         | 74,852        |
| Gross Amounts of Recognized Liabilities, Total Derivatives Not Subject to a Master Netting Arrangement or Similar Arrangement                                                       | 0             | 1,817         |
| Gross Amounts Offset in the Condensed Consolidated Balance Sheet, Total Derivatives Not Subject to a Master Netting Arrangement or Similar Arrangement                              | 0             | 0             |
| Net Amounts of Liabilities Presented in the Consolidated Balance Sheet, Total Derivatives Not Subject to a Master Netting Arrangement or Similar Arrangement                        | 0             | 1,817         |
| Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Pledged, Total Derivatives Not Subject to a Master Netting Arrangement or Similar Arrangement | 0             | 1,736         |
| Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount, Total Derivatives Not Subject to a Master Netting Arrangement or Similar Arrangement              | 0             | 81            |
| Gross Amounts of Recognized Liabilities, Total Derivative Liabilities                                                                                                               | 344,441       | 374,991       |
| Gross Amounts Offset in the Condensed Consolidated Balance Sheet, Total Derivative Liabilities                                                                                      | 116,779       | 21,109        |
| Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet, Total Derivative Liabilities                                                                      | 227,662       | 353,882       |
| Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Pledged                                                                                       | 219,250       | 222,225       |
| Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount, Total Derivatives Liabilities                                                                     | 4,060         | 74,933        |
| Gross Amounts of Recognized Liabilities, Total Financial Liabilities                                                                                                                | 344,441       | 374,991       |
| Gross Amounts Offset in the Condensed Consolidated Balance Sheet, Total Financial Liabilities                                                                                       | 116,779       | 21,109        |
| Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet, Total Financial Liabilities                                                                       | 227,662       | 353,882       |
| Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet - Financial Instruments, Total Financial Liabilities                                                           | 4,352         | 56,724        |
| Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet - Cash Collateral Pledged, Total Financial Liabilities                                                         | 219,250       | 222,225       |
| Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount, Total Financial Liabilities                                                                       | 4,060         | 74,933        |
| Other derivative activities                                                                                                                                                         |          |          |
| **Offsetting Liabilities [Line Items]**                                                                                                                                             |          |          |
| Gross Amounts of Recognized Liabilities                                                                                                                                             | 319,296       | 350,863       |
| Gross Amounts Offset in the Consolidated Balance Sheet                                                                                                                              | 111,190       | 21,109        |
| Net Amounts of Liabilities Presented in the Consolidated Balance Sheet                                                                                                              | 208,106       | 329,754       |
| Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Financial Instruments                                                                                         | 4,265         | 49,318        |
| Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Pledged                                                                                       | 174,849       | 198,103       |
| Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount                                                                                                    | 28,992        | 82,333        |
| Fair value hedges                                                                                                                                                                   |          |          |
| **Offsetting Liabilities [Line Items]**                                                                                                                                             |          |          |
| Gross Amounts of Recognized Liabilities                                                                                                                                             | 2,098         | 1,759         |
| Gross Amounts Offset in the Consolidated Balance Sheet                                                                                                                              | 0             | 0             |
| Net Amounts of Liabilities Presented in the Consolidated Balance Sheet                                                                                                              | 2,098         | 1,759         |
| Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Financial Instruments                                                                                         | 87            | 65            |
| Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Pledged                                                                                       | 10,602        | 5,589         |
| Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount                                                                                                    | (8,591)       | (3,895)       |
| Cash flow hedges                                                                                                                                                                    |          |          |
| **Offsetting Liabilities [Line Items]**                                                                                                                                             |          |          |
| Gross Amounts of Recognized Liabilities                                                                                                                                             | 23,047        | 20,552        |
| Gross Amounts Offset in the Consolidated Balance Sheet                                                                                                                              | 5,589         | 0             |
| Net Amounts of Liabilities Presented in the Consolidated Balance Sheet                                                                                                              | 17,458        | 20,552        |
| Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Financial Instruments                                                                                         | 0             | 7,341         |
| Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Pledged                                                                                       | 33,799        | 16,797        |
| Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount                                                                                                    | $ (16,341)    | $ (3,586)     |

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Amount of right to receive cash collateral under master netting arrangements that have not been offset against derivative liabilities.
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Amount of right to receive securities collateral under master netting arrangements that have not been offset against derivative liabilities.
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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.
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Fair value, after offset of derivative asset, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be and before offset against a right to receive collateral under a master netting arrangement. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.
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Fair value, after effects of master netting arrangements, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset offset against the right to receive collateral. Includes liabilities not subject to a master netting arrangement and not elected to be offset.
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Fair value of asset associated with financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.
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Fair value of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, not subject to a master netting arrangement, deducted from derivative liabilities.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount, after effects of master netting arrangements, of derivative liabilities, securities sold under agreements to repurchase and securities loaned offset against a right to receive collateral. Includes liabilities not subject to a master netting arrangement and not elected to be offset.
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Amount of right to receive cash collateral under master netting arrangements that have not been offset against derivative liabilities, securities sold under agreements to repurchase and securities loaned.
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Amount of right to receive securities collateral under master netting arrangements that have not been offset against derivative liabilities, securities sold under agreements to repurchase and securities loaned.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226016-175313
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| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
+ References
No definition available.
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