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STOCKHOLDERS' EQUITY (Details 5) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Reclassifications out of accumulated other comprehensive income |  |
Net gain on sales of investment securities | $ 5,577 | $ 483
Total before tax | 106,510 | 107,795
Tax expense | (34,419) | (39,712)
NET INCOME | 72,091 | 68,083
Amount Reclassified from Accumulated Other Comprehensive Income |  |
Reclassifications out of accumulated other comprehensive income |  |
Total before tax | 5,577 |
Tax expense | (2,342) |
NET INCOME | 3,235 |
Unrealized gain (loss) on investment securities available-for-sale | Amount Reclassified from Accumulated Other Comprehensive Income |  |
Reclassifications out of accumulated other comprehensive income |  |
Net gain on sales of investment securities | $ 5,577 |

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