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INVESTMENT SECURITIES (Details 2) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Dec. 31, 2013
Schedule of Available-for-sale Securities |  |  |  |  |  |
Proceeds from sales | $ 43,788 | $ 60,387 | $ 395,630 |  | $ 386,108 |
Gross realized gains | 2,514 | 1,084 | 6,730 |  | 12,006 |
Gross realized losses |  |  | 127 | [1] |  |
Related tax expense | 1,056 | 455 | 2,773 |  | 5,043 |
Other than temporary impairment | 0 | 0 | 0 |  | 0 | 0
MetroCorp |  |  |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |  |  |
Gross realized losses |  |  | $ 127 |  |  |
[1] | The gross $127 thousand of losses resulted from the investment securities acquired from MetroCorp which were sold immediately after the acquisition closed.

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- Definition This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 + Details
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- Definition The total amount of proceeds received for the sale of securities, categorized neither as held-to-maturity nor trading securities, during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 + Details
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