Employee Benefits - Pension and Other Defined Contribution Retirement Plan Expenses (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost for benefits earned	$ 771	$ 984
Interest cost on projected benefit obligation	6,007	5,953
Expected return on plan assets	(8,069)	(8,083)
Net amortization and deferrals	1,387	5,203
Total postretirement benefit expense	96	4,057
Total expense	2,498	6,192
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost for benefits earned	3,775	4,383
Interest cost on projected benefit obligation	6,366	6,392
Expected return on plan assets	(11,949)	(12,950)
Net amortization and deferrals	3,264	3,486
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	0	0
Total postretirement benefit expense	1,456	1,311
Total expense	3,163	2,906
United States Postretirement Benefit Plan of US Entity [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined contribution and other retirement plans	2,402	2,135
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined contribution and other retirement plans	$ 1,707	$ 1,595