Pension, Profit Sharing, and Other Employee Benefit Plans (Net Periodic Benefit Cost) (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]
Interest cost on projected benefit obligation	$ 1,629	$ 1,600	$ 1,550
Expected return on plan assets	(1,622)	(1,971)	(1,668)
Recognized net actuarial loss	1,032	251	1,255
Adjustment due to settlement accounting for termination liability	0	0	269
Net periodic benefit cost	$ 1,039	$ (120)	$ 1,406