Pensions - Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
U.S. [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Service cost	$ 807	$ 926	$ 850
Interest cost	12,580	12,334	13,479
Expected return on plan assets	(15,835)	(17,685)	(19,055)
Amortization of prior service cost and actuarial loss	1,714	1,110	67
Settlements	0	0	3,637
Other	0	0	0
Net periodic benefit cost (income)	(734)	(3,315)	(1,022)
Non-U.S. [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Service cost	3,346	3,489	3,367
Interest cost	5,041	5,084	7,069
Expected return on plan assets	(3,133)	(3,373)	(3,828)
Amortization of prior service cost and actuarial loss	2,186	2,666	894
Settlements	538	132	444
Other	0	221	(1)
Net periodic benefit cost (income)	$ 7,978	$ 8,219	$ 7,945