Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Loss) (Additional Information) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	$ (7,953)	$ 1,928	$ (10,240)	$ 6,170
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax	8,530	(30)	8,725	(59)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	(580)	372	701	713
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax			(1,188)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	961	810	1,986	1,542
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	(81)	(80)	(159)	(164)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax	234	208	487	392
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	$ (21)	$ (98)	(134)	$ 123
Adjustments for New Accounting Principle, Early Adoption [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax			8,569
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax			$ 70