OTHER COMPREHENSIVE INCOME (LOSS) (Net Accumulated Other Comprehensive Income (Loss)) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (1,297)	$ (823)	$ (2,970)
Total other comprehensive income (loss)	(5,317)	(474)	2,147
Ending Balance	(6,614)	(1,297)	(823)
Unrealized Gains (Losses) on Investments Available-for-Sale
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	6,566	8,078	358
Total other comprehensive income (loss)	(4,924)	(1,512)	7,720
Ending Balance	1,642	6,566	8,078
Defined Benefit Pension Plan
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(7,863)	(8,901)	(3,328)
Total other comprehensive income (loss)	(393)	1,038	(5,573)
Ending Balance	$ (8,256)	$ (7,863)	$ (8,901)