Accumulated Other Comprehensive Income (Loss) - Summary of Amounts Reclassifications Out of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income Before Provision for Income Taxes		$ 28,532	$ 29,312	$ 37,063	$ 44,330	$ 7,009	$ 27,143	$ 39,196	$ 40,468	$ 139,237	$ 113,816	$ 102,856
Tax benefit										(47,690)	(27,618)	(26,819)
Interest, net		$ (2,826)	$ (2,763)	$ (2,863)	$ (2,992)	$ (3,350)	$ (2,824)	$ (3,417)	$ (3,614)	(11,444)	(13,205)	(14,533)
Cost of Sales										1,586,742	1,427,621	1,467,926
Defined Benefit Pension Plan Adjustments [Member] | Amounts Reclassified From Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Prior service cost	[1]									(14)	(14)	(17)
Actuarial loss	[1]									(3,509)	(3,508)	(4,757)
Income Before Provision for Income Taxes	[1],[2]									(3,523)	(3,522)	(4,774)
Tax benefit	[1]									1,244	1,305	1,761
Income applicable to common stock	[1]									(2,279)	(2,217)	(3,013)
Cash Flow Hedge Adjustments [Member] | Amounts Reclassified From Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income Before Provision for Income Taxes	[1]									9	(73)	(13)
Tax benefit	[1]										28	8
Income applicable to common stock	[1]									9	(45)	(5)
Cash Flow Hedge Adjustments [Member] | Interest rate contracts [Member] | Amounts Reclassified From Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest, net	[1]										(82)	(22)
Cash Flow Hedge Adjustments [Member] | Foreign exchange contracts [Member] | Amounts Reclassified From Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Cost of Sales	[1]									9	9	9
Accumulated Other Comprehensive Income (Loss) [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income applicable to common stock	[1]									$ (2,270)	$ (2,262)	$ (3,018)

[1] Amounts in parentheses denote expense to statement of income.

[2] This component of accumulated other comprehensive income is included in the computation of net periodic benefit cost (see Note 13 for details regarding net periodic benefit costs for the Company’s U.S. and U.K. defined benefit plans).