Employer Sponsored Benefit Plan (Components of Net Periodic Benefit Cost) (Detail) - Domestic Pension Plan - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Interest cost		$ 2,066	$ 2,348	$ 2,453
Expected return on plan assets		(2,360)	(2,798)	(2,691)
Amortization of actuarial net loss		897	725	1,069
Pension settlement cost	$ 4,900	0	4,914	0
Total net periodic benefit cost		$ 603	$ 5,189	$ 831