Benefit Plans - Schedule of Defined Benefit Plan in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Beginning amount recorded in other accumulated comprehensive income (loss)	$ (548)
Amounts recorded in accumulated other comprehensive income (loss) consist of:
Pension obligation adjustment, net of tax	548	$ (1,716)
Total recorded in accumulated other comprehensive income	$ (548)