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STOCKHOLDERS' EQUITY - Changes to Accumulate Other Comprehensive Income by Components (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Balance at beginning of period $ 552 $ 491 $ 373 $ (600)
Unrealized gain (loss) arising during the period 3,697 (592) 3,607 1,021
Reclassification adjustment from other comprehensive income (1,846) 0 (1,612) (522)
Tax effect of current period changes (818) 0 (783) 0
Total changes, net of taxes 1,033 (592) 1,212 499
Balance at end of period 1,585 (101) 1,585 (101)
Available for Sale Securities        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Balance at beginning of period 456 774 509 (826)
Unrealized gain (loss) arising during the period 3,697 (980) 3,607 1,142
Reclassification adjustment from other comprehensive income (1,750) 0 (1,748) (522)
Tax effect of current period changes (818) 0 (783) 0
Total changes, net of taxes 1,129 (980) 1,076 620
Balance at end of period 1,585 (206) 1,585 (206)
Cash Flow Hedge        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Balance at beginning of period 96 (283) (136) 226
Unrealized gain (loss) arising during the period (1,084) 388 (683) (121)
Reclassification adjustment from other comprehensive income 918 0 918 0
Tax effect of current period changes 70 0 (99) 0
Total changes, net of taxes (96) 388 136 (121)
Balance at end of period $ 0 $ 105 $ 0 $ 105