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INVESTMENT SECURITIES (Details 4) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Continuous unrealized loss position, fair values of investment securities available-for-sale |  |
Continuous unrealized loss position less than 12 months, fair value | $ 1,803,074 | $ 620,165
Continuous unrealized loss position less than 12 months, unrealized losses | (45,167) | (6,989)
Continuous unrealized loss position 12 months or more, fair value | 250,361 | 195,271
Continuous unrealized loss position 12 months or more, unrealized losses | (19,729) | (19,739)
Continuous unrealized loss position total, fair value | 2,053,435 | 815,436
Continuous unrealized loss position total, unrealized losses | (64,896) | (26,728)
U.S. Treasury securities |  |
Continuous unrealized loss position, fair values of investment securities available-for-sale |  |
Continuous unrealized loss position less than 12 months, fair value | 337,248 | 95,232
Continuous unrealized loss position less than 12 months, unrealized losses | (3,622) | (71)
Continuous unrealized loss position total, fair value | 337,248 | 95,232
Continuous unrealized loss position total, unrealized losses | (3,622) | (71)
U.S. Government agency and U.S. Government sponsored enterprise debt securities |  |
Continuous unrealized loss position, fair values of investment securities available-for-sale |  |
Continuous unrealized loss position less than 12 months, fair value | 387,097 | 24,912
Continuous unrealized loss position less than 12 months, unrealized losses | (12,726) | (82)
Continuous unrealized loss position total, fair value | 387,097 | 24,912
Continuous unrealized loss position total, unrealized losses | (12,726) | (82)
U.S. Government agency and U.S. Government sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities |  |
Continuous unrealized loss position, fair values of investment securities available-for-sale |  |
Continuous unrealized loss position less than 12 months, fair value | 114,754 | 10,013
Continuous unrealized loss position less than 12 months, unrealized losses | (3,280) | (36)
Continuous unrealized loss position 12 months or more, fair value | 16,065 |
Continuous unrealized loss position 12 months or more, unrealized losses | (1,169) |
Continuous unrealized loss position total, fair value | 130,819 | 10,013
Continuous unrealized loss position total, unrealized losses | (4,449) | (36)
U.S. Government agency and U.S. Government sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities |  |
Continuous unrealized loss position, fair values of investment securities available-for-sale |  |
Continuous unrealized loss position less than 12 months, fair value | 502,285 | 215,826
Continuous unrealized loss position less than 12 months, unrealized losses | (10,570) | (678)
Continuous unrealized loss position 12 months or more, fair value | 92,540 |
Continuous unrealized loss position 12 months or more, unrealized losses | (4,357) |
Continuous unrealized loss position total, fair value | 594,825 | 215,826
Continuous unrealized loss position total, unrealized losses | (14,927) | (678)
Municipal securities |  |
Continuous unrealized loss position, fair values of investment securities available-for-sale |  |
Continuous unrealized loss position less than 12 months, fair value | 173,782 | 48,363
Continuous unrealized loss position less than 12 months, unrealized losses | (10,765) | (731)
Continuous unrealized loss position 12 months or more, fair value | 47,892 |
Continuous unrealized loss position 12 months or more, unrealized losses | (6,768) |
Continuous unrealized loss position total, fair value | 221,674 | 48,363
Continuous unrealized loss position total, unrealized losses | (17,533) | (731)
Other residential mortgage-backed securities: | Investment grade |  |
Continuous unrealized loss position, fair values of investment securities available-for-sale |  |
Continuous unrealized loss position less than 12 months, fair value | 46,328 |
Continuous unrealized loss position less than 12 months, unrealized losses | (1,802) |
Continuous unrealized loss position total, fair value | 46,328 |
Continuous unrealized loss position total, unrealized losses | (1,802) |
Corporate debt securities | Investment grade |  |
Continuous unrealized loss position, fair values of investment securities available-for-sale |  |
Continuous unrealized loss position less than 12 months, fair value | 193,482 | 225,819
Continuous unrealized loss position less than 12 months, unrealized losses | (1,538) | (5,391)
Continuous unrealized loss position 12 months or more, fair value | 79,442 | 182,697
Continuous unrealized loss position 12 months or more, unrealized losses | (1,806) | (12,181)
Continuous unrealized loss position total, fair value | 272,924 | 408,516
Continuous unrealized loss position total, unrealized losses | (3,344) | (17,572)
Corporate debt securities | Non-investment grade |  |
Continuous unrealized loss position, fair values of investment securities available-for-sale |  |
Continuous unrealized loss position 12 months or more, fair value | 14,422 | 12,574
Continuous unrealized loss position 12 months or more, unrealized losses | (5,629) | (7,558)
Continuous unrealized loss position total, fair value | 14,422 | 12,574
Continuous unrealized loss position total, unrealized losses | (5,629) | (7,558)
Other securities |  |
Continuous unrealized loss position, fair values of investment securities available-for-sale |  |
Continuous unrealized loss position less than 12 months, fair value | 48,098 |
Continuous unrealized loss position less than 12 months, unrealized losses | (864) |
Continuous unrealized loss position total, fair value | 48,098 |
Continuous unrealized loss position total, unrealized losses | $ (864) |

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