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INVESTMENT SECURITIES (Details 3) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Gross realized gains |  |  |  |
Gross realized gains | $ 1,790 | $ 17,036 | $ 8,593 | $ 26,994
Corporate debt securities | Non-investment grade |  |  |  |
Gross realized gains |  |  |  |
Gross realized gains |  | 10,900 |  | 11,900
Investment securities available-for-sale |  |  |  |
Other Than Temporary Impairment Credit Losses Recognized in Earnings [Roll Forward] |  |  |  |
Beginning balance | 0 | 106,688 | 0 | 112,338
Addition of OTTI previously not recognized | 0 | 0 | 0 | 0
Additional increase to the amount related to the credit loss for which an OTTI was previously recognized | 0 | 0 | 0 | 0
Reduction for securities sold | 0 | (74,765) | 0 | (80,415)
Ending balance | $ 0 | $ 31,923 | $ 0 | $ 31,923

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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 Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27340-111563 + Details
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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 no such other than temporary impairment (OTTI) was previously recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27340-111563 + Details
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- Definition This item represents reductions in the cumulative amount of credit losses recognized in earnings for an other than temporary impairment (OTTI) of a debt security because of the sale of impaired securities during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27340-111563 + Details
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