Accumulated Other Comprehensive Income (Loss) - Summary of Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 634,604
Other comprehensive income before reclassifications	10,441	$ 12,556
Amounts reclassified from AOCI	563	566
Net current-period other comprehensive income	11,004	13,122
Ending Balance	673,233
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(96,775)	(88,337)
Other comprehensive income before reclassifications	10,441	12,579
Net current-period other comprehensive income	10,441	12,579
Ending Balance	(86,334)	(75,758)
Defined Benefit Pension Plan Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(30,790)	(36,825)
Amounts reclassified from AOCI	565	564
Net current-period other comprehensive income	565	564
Ending Balance	(30,225)	(36,261)
Cash Flow Hedge Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	100	74
Other comprehensive income before reclassifications		(23)
Amounts reclassified from AOCI	(2)	2
Net current-period other comprehensive income	(2)	(21)
Ending Balance	98	53
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(127,465)	(125,088)
Ending Balance	$ (116,461)	$ (111,966)