OTHER COMPREHENSIVE INCOME (LOSS) (Net Accumulated Other Comprehensive Income (Loss)) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (6,614)	$ (1,297)
Other comprehensive income before reclassification, net of tax	904	6,423
Reclassifications from accumulated other comprehensive income, net of tax	176	(893)
Total other comprehensive income (loss)	1,080	5,530
Ending Balance	(5,534)	4,233
Unrealized Gains (Losses) on Investments Available-for-Sale
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	1,642	6,566
Other comprehensive income before reclassification, net of tax	904	6,423
Reclassifications from accumulated other comprehensive income, net of tax	(2)	(1,064)
Total other comprehensive income (loss)	902	5,359
Ending Balance	2,544	11,925
Defined Benefit Pension Plan
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(8,256)	(7,863)
Other comprehensive income before reclassification, net of tax	0	0
Reclassifications from accumulated other comprehensive income, net of tax	178	171
Total other comprehensive income (loss)	178	171
Ending Balance	$ (8,078)	$ (7,692)