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STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE (Details 6) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Unrealized gain (loss) on investment securities available-for-sale: |  |  |
Unrealized gains (losses) on holding gains (losses) arising during period, before-tax amount | $ (48,567) | $ 73,910 | $ (21,264)
Less: reclassification adjustment for losses/(gains) included in income, before-tax amount | (12,089) | (757) | (9,703)
Net unrealized gain (loss), before-tax amount | (60,656) | 73,153 | (30,967)
Non credit-related impairment loss on securities, before-tax amount |  | (5,066) | (5,103)
Foreign currency translation adjustments, before-tax amount |  | (1,552) | (1,317)
Unrealized gain on other asset investment, before-tax amount | 579 | 53 | 334
Less: reclassification adjustment for gains included in income, before-tax amount | (488) | (23) | (61)
Other comprehensive income (loss), before-tax amount | (60,565) | 66,565 | (37,114)
Unrealized gain (loss) on investment securities available-for-sale: |  |  |
Unrealized gains (losses) on holding gains (losses) arising during period, tax (expense) or benefit | 20,398 | (31,042) | 8,931
Less: reclassification adjustment for losses/(gains) included in income, tax (expense) or benefit | 5,077 | 318 | 4,075
Net unrealized gain (loss), tax (expense) or benefit | 25,475 | (30,724) | 13,006
Non credit-related impairment loss on securities, tax effect |  | 2,128 | 2,143
Foreign currency translation adjustments, tax (expense) or benefit |  | 652 | 553
Unrealized gain on other asset investment, tax (expense) or benefit | (243) | (22) | (140)
Less: reclassification adjustment for gains included in income, tax (expense) or benefit | 205 | 10 | 26
Other comprehensive income (loss), tax (expense) or benefit | 25,437 | (27,956) | 15,588
Unrealized gain (loss) on investment securities available-for-sale: |  |  |
Unrealized gains (losses) on holding gains (losses) arising during period, net of tax amount | (28,169) | 42,868 | (12,333)
Less: reclassification adjustment for losses/(gains) included in income | (7,012) | (439) | (5,628)
Net unrealized gain (loss), net of tax amount | (35,181) | 42,429 | (17,961)
Non credit-related impairment loss on securities, net of tax amount |  | (2,938) | (2,960)
Foreign currency translation adjustments, net of tax amount |  | (900) | (764)
Unrealized gain on other asset investment, net of tax amount | 336 | 31 | 194
Less: reclassification adjustment for gains included in income, net of tax amount | (283) | (13) | (35)
Other comprehensive (loss) income | $ (35,128) | $ 38,609 | $ (21,526)

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