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STOCKHOLDERS' EQUITY (Details 6) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Unrealized gain (loss) on investment securities available-for-sale: |  |  |  |
Unrealized gains (losses) on holding gains (losses) arising during period, before-tax amount | $ (42,707) | $ 1,728 | $ (34,533) | $ 36,676
Less: reclassification adjustment for losses/(gains) included in income, before-tax amount | (5,345) | (71) | (10,922) | (554)
Net unrealized gain (loss), before-tax amount | (48,052) | 1,657 | (45,455) | 36,122
Non credit-related impairment loss on securities, before-tax amount |  |  |  | (5,066)
Unrealized gain (loss) on other investment, before-tax amount | 12 | (10) | 29 | 7
Other comprehensive income, before-tax amount | (48,040) | 1,647 | (45,426) | 31,063
Unrealized gain (loss) on investment securities available-for-sale: |  |  |  |
Unrealized gains (losses) on holding gains (losses) arising during period, tax (expense) or benefit | 17,937 | (726) | 14,504 | (15,404)
Less: reclassification adjustment for losses/(gains) included in income, tax (expense) or benefit | 2,245 | 30 | 4,587 | 233
Net unrealized gain (loss), tax (expense) or benefit | 20,182 | (696) | 19,091 | (15,171)
Non credit-related impairment loss on securities, tax effect |  |  |  | 2,128
Unrealized gain (loss) on other investment, tax (expense) or benefit | (5) | 4 | (12) | (3)
Other comprehensive income, tax (expense) or benefit | 20,177 | (692) | 19,079 | (13,046)
Unrealized gain on investment securities available-for-sale: |  |  |  |
Unrealized gains (losses) on holding gains (losses) arising during period, net of tax amount | (24,770) | 1,002 | (20,029) | 21,272
Less: reclassification adjustment for losses/(gains) included in income | (3,100) | (41) | (6,335) | (321)
Net unrealized gains (loss), net of tax amount | (27,870) | 961 | (26,364) | 20,951
Non credit-related impairment loss on securities, net of tax amount |  |  |  | (2,938)
Unrealized gain (loss) on other investment, net of tax amount | 7 | (6) | 17 | 4
Other comprehensive (loss) income | $ (27,863) | $ 955 | $ (26,347) | $ 18,017

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