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STOCKHOLDERS' EQUITY - Changes to Accumulate Other Comprehensive Income by Components (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Balance at beginning of period $ 2,198 $ (301) $ 373 $ (600)
Unrealized gain (loss) arising during the period (2,839) 807 311 1,613
Reclassification adjustment from other comprehensive income 0 (15) 2 (522)
Tax effect of current period changes 1,193 0 (134) 0
Total changes, net of taxes (1,646) 792 179 1,091
Balance at end of period 552 491 552 491
Available for Sale Securities        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Balance at beginning of period 2,438 (310) 509 (826)
Unrealized gain (loss) arising during the period (3,420) 1,099 (90) 2,122
Reclassification adjustment from other comprehensive income 0 (15) 2 (522)
Tax effect of current period changes 1,438 0 35 0
Total changes, net of taxes (1,982) 1,084 (53) 1,600
Balance at end of period 456 774 456 774
Cash Flow Hedge        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Balance at beginning of period (240) 9 (136) 226
Unrealized gain (loss) arising during the period 581 (292) 401 (509)
Reclassification adjustment from other comprehensive income 0 0 0 0
Tax effect of current period changes (245) 0 (169) 0
Total changes, net of taxes 336 (292) 232 (509)
Balance at end of period $ 96 $ (283) $ 96 $ (283)