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INVESTMENT SECURITIES - Proceeds from Sales and Calls of Securities and Associated Gross Gains and Losses (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Schedule of Available-for-sale Securities [Line Items]        
Net realized gains (losses) on sales of securities available for sale $ 0 $ 15 $ (2) $ 522
Proceeds from sales of securities available for sale 0 1,272 174 52,245
Tax benefit on sales of securities available for sale 0 0 (1) 0
Debt Securities        
Schedule of Available-for-sale Securities [Line Items]        
Gross realized gains on sales of securities available for sale 0 15 0 560
Gross realized losses on sales of securities available for sale 0 0 (2) (38)
Net realized gains (losses) on sales of securities available for sale $ 0 $ 15 $ (2) $ 522