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INVESTMENT SECURITIES (Details 3) (USD $) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Schedule of Available-for-sale Securities |  |  |  |
Gross gains on sale of investment securities | $ 671,000 | $ 5,300,000 | $ 4,200,000 | $ 10,900,000
Gross losses on sale of investment securities |  |  | 127,000 | 0
Tax expense on sale of investment securities | 282,000 | 2,200,000 | 1,700,000 | 4,600,000
Net proceeds for sales of investment securities | 21,600,000 | 128,900,000 | 351,800,000 | 325,700,000
MetroCorp |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Gross losses on sale of investment securities |  |  | $ 127,000 |

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