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INVESTMENT SECURITIES (Details 5) (USD $) In Thousands, unless otherwise specified | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2014 item | Dec. 31, 2013 item
Schedule of Available-for-sale Securities |  |  |  |
Fair value of available for sale securities | $ 2,529,652 |  | $ 2,733,797 |
Number of securities in a continuous unrealized loss position for more than twelve months | 168 |  | 65 |
Unrealized losses in loss position for twelve months or more | (22,713) |  | (19,729) |
Number of individual securities with a continuous unrealized loss position less than 12 months | 37 |  | 239 |
Unrealized losses in loss position for less than twelve months | (3,939) |  | (45,167) |
Continuous unrealized loss position 12 months or more, fair value | 966,358 |  | 250,361 |
U.S. Government agency and U.S. Government sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Fair value of available for sale securities | 797,966 |  | 885,237 |
Total investment securities available-for-sale portfolio (as a percent) | 32.00% |  | 32.00% |
Number of securities in a continuous unrealized loss position for more than twelve months | 44 |  | 21 |
Unrealized losses in loss position for twelve months or more | (7,065) |  | (4,357) |
Number of individual securities with a continuous unrealized loss position less than 12 months | 22 |  | 55 |
Unrealized losses in loss position for less than twelve months | (1,992) |  | (10,570) |
Continuous unrealized loss position 12 months or more, fair value | 306,292 |  | 92,540 |
Municipal securities |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Fair value of available for sale securities | 289,479 |  | 280,979 |
Total investment securities available-for-sale portfolio (as a percent) | 11.00% |  | 10.00% |
Number of securities in a continuous unrealized loss position for more than twelve months | 79 |  | 32 |
Unrealized losses in loss position for twelve months or more | (4,632) |  | (6,768) |
Number of individual securities with a continuous unrealized loss position less than 12 months | 2 |  | 94 |
Unrealized losses in loss position for less than twelve months | (15) |  | (10,765) |
Continuous unrealized loss position 12 months or more, fair value | 138,062 |  | 47,892 |
Trust Preferred Securities |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Number of securities in a continuous unrealized loss position for more than twelve months |  |  | 5 |
Continuous unrealized loss position 12 months or more, fair value |  |  | 14,400 |
Other securities |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Fair value of available for sale securities | 106,421 |  | 79,716 |
Number of securities in a continuous unrealized loss position for more than twelve months | 1 |  |  |
Unrealized losses in loss position for twelve months or more | (64) |  |  |
Number of individual securities with a continuous unrealized loss position less than 12 months | 2 |  | 9 |
Unrealized losses in loss position for less than twelve months | (440) |  | (864) |
Continuous unrealized loss position 12 months or more, fair value | 2,904 |  |  |
Corporate debt securities | Investment grade |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Fair value of available for sale securities | 210,870 |  | 309,995 |
Number of securities in a continuous unrealized loss position for more than twelve months | 6 |  | 4 |
Unrealized losses in loss position for twelve months or more | (1,389) |  | (1,806) |
Number of individual securities with a continuous unrealized loss position less than 12 months | 1 |  | 8 |
Unrealized losses in loss position for less than twelve months | (57) |  | (1,538) |
Continuous unrealized loss position 12 months or more, fair value | 89,752 |  | 79,442 |
Corporate debt securities | Non-investment grade |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Fair value of available for sale securities | 16,579 | [1] | 15,101 | [1]
Number of securities in a continuous unrealized loss position for more than twelve months | 4 |  |  |
Unrealized losses in loss position for twelve months or more | (3,505) |  | (5,629) |
Continuous unrealized loss position 12 months or more, fair value | 14,660 |  | 14,422 |
U.S. Treasury securities |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Fair value of available for sale securities | 449,312 |  | 491,632 |
Number of securities in a continuous unrealized loss position for more than twelve months | 18 |  |  |
Unrealized losses in loss position for twelve months or more | (1,588) |  |  |
Number of individual securities with a continuous unrealized loss position less than 12 months | 3 |  | 33 |
Unrealized losses in loss position for less than twelve months | (40) |  | (3,622) |
Continuous unrealized loss position 12 months or more, fair value | 184,740 |  |  |
U.S. Government agency and U.S. Government sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Fair value of available for sale securities | 111,757 |  | 178,870 |
Number of securities in a continuous unrealized loss position for more than twelve months | 9 |  | 3 |
Unrealized losses in loss position for twelve months or more | (850) |  | (1,169) |
Number of individual securities with a continuous unrealized loss position less than 12 months | 5 |  | 19 |
Unrealized losses in loss position for less than twelve months | (513) |  | (3,280) |
Continuous unrealized loss position 12 months or more, fair value | 43,550 |  | 16,065 |
U.S. government agency and U.S. government sponsored enterprise debt securities |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Fair value of available for sale securities | 438,599 |  | 394,323 |
Total investment securities available-for-sale portfolio (as a percent) | 17.00% |  | 14.00% |
Number of securities in a continuous unrealized loss position for more than twelve months | 5 |  |  |
Unrealized losses in loss position for twelve months or more | (3,204) |  |  |
Number of individual securities with a continuous unrealized loss position less than 12 months | 2 |  | 16 |
Unrealized losses in loss position for less than twelve months | (882) |  | (12,726) |
Continuous unrealized loss position 12 months or more, fair value | 171,913 |  |  |
Other residential mortgage-backed securities: | Investment grade |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Fair value of available for sale securities | 57,206 |  | 46,327 |
Number of securities in a continuous unrealized loss position for more than twelve months | 2 |  |  |
Unrealized losses in loss position for twelve months or more | (416) |  |  |
Number of individual securities with a continuous unrealized loss position less than 12 months |  |  | 5 |
Unrealized losses in loss position for less than twelve months |  |  | (1,802) |
Continuous unrealized loss position 12 months or more, fair value | 14,485 |  |  |
Other commercial mortgage-backed securities: | Investment grade |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Fair value of available for sale securities | $ 51,463 |  | $ 51,617 |
[1] | For the six months ended June 30, 2014 and the year ended December 31, 2013, the Company did not record any OTTI.

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