Pension, Profit Sharing, and Other Employee Benefit Plans (Component of Net Periodic Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Pension, Profit Sharing, and Other Employee Benefit Plans [Abstract]
Net actuarial loss	$ (13,038)	$ (14,774)	$ (5,539)
Net periodic benefit cost not yet recognized	$ (13,038)	$ (14,774)	$ (5,539)