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INVESTMENT SECURITIES (Details 4) (USD $) |  |  |  |  |  |  | 3 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2012 Security | Dec. 31, 2011 | Mar. 31, 2012 US Government Agencies and Government Sponsored Enterprise Debt Securities Security | Mar. 31, 2012 Residential mortgage-backed securities Security | Mar. 31, 2012 Corporate debt securities Investment grade Security | Dec. 31, 2011 Corporate debt securities Investment grade | Mar. 31, 2012 Corporate debt securities Non-investment grade Security | Dec. 31, 2011 Corporate debt securities Non-investment grade | Mar. 31, 2012 Trust Preferred Securities Security
Schedule of Available-for-sale Securities |  |  |  |  |  |  |  |  |  |  |
Fair value of available for sale securities | $ 2,706,720,000 | $ 3,072,578,000 |  |  | $ 1,090,609,000 | $ 1,322,561,000 | $ 13,922,000 | [1] | $ 19,615,000 | [1] |
Continuous unrealized loss position 12 months or more, fair value | 366,815,000 | 359,776,000 |  |  | 357,426,000 | 350,181,000 | 9,389,000 |  | 9,595,000 |  | 9,400,000
Total investment securities available-for-sale portfolio (as a percent) |  |  |  |  | 40.00% |  |  |  |  |  | 1.00%
Number of securities in a continuous unrealized loss position for more than twelve months | 23 |  |  |  | 18 |  |  |  |  |  | 5
Number of individual securities with a continuous unrealized loss position less than 12 months | 61 |  | 6 | 6 | 47 |  | 2 |  |  |  |
Percentage of total amortized cost basis of these securities |  |  |  |  |  |  | 53.00% |  |  |  |
Gross Unrealized Losses | (79,232,000) | (107,746,000) |  |  | (67,631,000) | (95,610,000) | (10,707,000) | [1] | (11,078,000) | [1] |
Gross unrealized losses in loss position twelve months or more | 48,251,000 | 44,188,000 |  |  | 37,574,000 | 33,675,000 | 10,677,000 |  | 10,513,000 |  |
Gross unrealized losses, trust preferred securities, portion representing impairment loss on securities not other-than-temporarily-impaired |  |  |  |  |  |  | 5,600,000 |  |  |  |
Gross unrealized losses, trust preferred securities, portion representing non-credit impairment loss on securities other-than-temporarily-impaired |  |  |  |  |  |  | 5,100,000 |  |  |  |
Impairment loss relating to additional increases to the amount related to the credit loss for which an other-than-temporary impairment was previously recognized |  |  |  |  |  |  |  |  |  |  | 99,000
Scheduled maturities of investment securities available-for sale, amortized cost basis |  |  |  |  |  |  |  |  |  |  |
Due within one year | 625,794,000 |  |  |  |  |  |  |  |  |  |
Due after one year through five years | 252,183,000 |  |  |  |  |  |  |  |  |  |
Due after five years through ten years | 880,483,000 |  |  |  |  |  |  |  |  |  |
Due after ten years | 979,227,000 |  |  |  |  |  |  |  |  |  |
Total investment securities available-for-sale | 2,737,687,000 |  |  |  |  |  |  |  |  |  |
Scheduled maturities of investment securities available-for sale, fair value |  |  |  |  |  |  |  |  |  |  |
Due within one year | 621,332,000 |  |  |  |  |  |  |  |  |  |
Due after one year through five years | 248,610,000 |  |  |  |  |  |  |  |  |  |
Due after five years through ten years | 829,519,000 |  |  |  |  |  |  |  |  |  |
Due after ten years | 1,007,259,000 |  |  |  |  |  |  |  |  |  |
Total investment securities available-for-sale | $ 2,706,720,000 |  |  |  |  |  |  |  |  |  |
[1] | For the three months ended March 31, 2012, the Company recorded $99 thousand, on a pre-tax basis, of the credit portion of OTTI through earnings and $5.1 million of the non-credit portion of OTTI for pooled trust preferred securities in other comprehensive income. The Company recorded $633 thousand, on a pre-tax basis, of the credit portion of OTTI through earnings and $5.1 million of the non-credit portion of OTTI for pooled trust preferred securities and other mortgage-backed securities in other comprehensive income for the year ended December 31, 2011.

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- Definition This item represents an increase to the cumulative amount of credit losses recognized in earnings for an other than temporary impairment (OTTI) of a debt security held for which a previous OTTI was recognized and the investor does not intend to sell the debt security and it is not more likely than not that the investor will be required to sell the debt security before recovery of its amortized cost basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 18B -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (e) -SubTopic 10 -Topic 320 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27340-111563 + Details
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Period Type: | duration

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