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, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income Before Provision for Income Taxes		$ 34,519	$ 25,243	$ 42,497	$ 37,664	$ 28,532	$ 29,312	$ 37,063	$ 44,330	$ 139,923	$ 139,237	$ 113,816
Tax benefit										(27,173)	(47,690)	(27,618)
Interest, net		$ (2,151)	$ (2,797)	$ (2,672)	$ (3,151)	$ (2,826)	$ (2,763)	$ (2,863)	$ (2,992)	(10,771)	(11,444)	(13,205)
Cost of Sales	[1]									1,652,354	1,586,485	1,426,897
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	[2]									(12)	(14)	(14)
Actuarial loss	[2]									(4,059)	(3,509)	(3,508)
Income Before Provision for Income Taxes	[2],[3]									(4,071)	(3,523)	(3,522)
Tax benefit	[2]									981	1,244	1,305
Income applicable to common stock	[2]									(3,090)	(2,279)	(2,217)
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	[2]									10	9	(73)
Tax benefit	[2]											28
Income applicable to common stock	[2]									10	9	(45)
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	[2]											(82)
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	[2]									10	9	9
Accumulated Other Comprehensive Income (Loss) [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income applicable to common stock	[2]									$ (3,080)	$ (2,270)	$ (2,262)

[1] The 2017 and 2016 amounts for the noted line items have been immaterially changed from the amounts originally reported as a result of the Company’s first quarter 2018 adoption of ASU No. 2017-7, Compensation –Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost.

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

[3] 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).