Accumulated Other Comprehensive Income (Loss) - Summary of Changes in Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss), beginning balance	$ (83,945)	$ (29,528)
Other comprehensive income before reclassifications	(25,180)	117
Amounts reclassified from AOCI	750	413
Net current-period other comprehensive income	(24,430)	530
Accumulated Other Comprehensive Income (Loss), ending balance	(108,375)	(28,998)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss), beginning balance	(42,914)	(10,971)
Other comprehensive income before reclassifications	(25,137)	117
Net current-period other comprehensive income	(25,137)	117
Accumulated Other Comprehensive Income (Loss), ending balance	(68,051)	(10,854)
Defined Benefit Pension Plan Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss), beginning balance	(41,149)	(18,672)
Amounts reclassified from AOCI	749	410
Net current-period other comprehensive income	749	410
Accumulated Other Comprehensive Income (Loss), ending balance	(40,400)	(18,262)
Cash Flow Hedge Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss), beginning balance	118	115
Other comprehensive income before reclassifications	(43)
Amounts reclassified from AOCI	1	3
Net current-period other comprehensive income	(42)	3
Accumulated Other Comprehensive Income (Loss), ending balance	$ 76	$ 118