| **DERIVATIVES (Income Statement Effect) (Details) (USD $)In Thousands, unless otherwise specified** | 3 Months Ended | 6 Months Ended |
|-----------------------------------------------------------------------------------------------------|----------------|----------------|
||
| Cross currency swaps [Member] | Miscellaneous income [Member] | Fair value hedges [Member]          |           |           |   |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                |           |           |   |   |
| Gain (loss) recognized on all derivatives                                                           | $ 1,454        | $ (7)          | $ 773 | $ 1,739 |
| Interest rate swaps [Member] | Miscellaneous income [Member] | Fair value hedges [Member]           |           |           |   |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                |           |           |   |   |
| Gain (loss) recognized on all derivatives                                                           | (1,488)        | 0              | (753) | 0 |
| Interest rate swaps [Member] | Net interest income [Member] | Cash flow hedges [Member]             |           |           |   |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                |           |           |   |   |
| Gain (loss) recognized on all derivatives                                                           | (13,782)       | (17,578)       | (27,467) | (35,311) |
| Forward commitments to sell loans [Member] | Mortgage banking income [Member]                       |           |           |   |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                |           |           |   |   |
| Gain (loss) recognized on all derivatives                                                           | (3,243)        | 40,616         | (5,252) | 40,360 |
| Interest rate lock commitments [Member] | Mortgage banking income [Member]                          |           |           |   |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                |           |           |   |   |
| Gain (loss) recognized on all derivatives                                                           | 2,364          | (21,148)       | 3,545 | (24,868) |
| Mortgage servicing rghts [Member] | Mortgage banking income [Member]                                |           |           |   |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                |           |           |   |   |
| Gain (loss) recognized on all derivatives                                                           | 2,629          | 51             | (5,132) | 870 |
| Customer related derivatives [Member] | Miscellaneous income [Member]                               |           |           |   |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                |           |           |   |   |
| Gain (loss) recognized on all derivatives                                                           | 3,548          | 7,155          | 3,661 | 9,544 |
| Foreign exchange [Member] | Miscellaneous income [Member]                                           |           |           |   |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                |           |           |   |   |
| Gain (loss) recognized on all derivatives                                                           | 419            | (632)          | (492) | (1,702) |
| SCUSA derivatives [Member] | Miscellaneous income [Member]                                          |           |           |   |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                |           |           |   |   |
| Gain (loss) recognized on all derivatives                                                           | 5,114          | 0              | 18,139 | 0 |
| SCUSA derivatives [Member] | Net interest income [Member]                                           |           |           |   |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                |           |           |   |   |
| Gain (loss) recognized on all derivatives                                                           | (2,141)        | 0              | (3,980) | 0 |
| Other [Member] | Miscellaneous income [Member]                                                      |           |           |   |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                |           |           |   |   |
| Gain (loss) recognized on all derivatives                                                           | (661)          | 0              | (1,309) | 0 |
| Other [Member] | Net interest income [Member]                                                       |           |           |   |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                |           |           |   |   |
| Gain (loss) recognized on all derivatives                                                           | 0              | (2,418)        | 0 | (3,121) |
| Other [Member] | Non-interest income [Member]                                                       |           |           |   |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                |           |           |   |   |
| Gain (loss) recognized on all derivatives                                                           | $ 0            | $ (15,508)     | $ 0 | $ (15,508) |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959
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| X                                                                                                                                                                          |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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