Stock-Based Compensation - Additional Information (Detail) - USD ($)		3 Months Ended
		Mar. 30, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Price	[1]	$ 78.65
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense		$ 549,000	$ 471,000
Share Based Compensation Arrangement By Share Based Payment Award Options Expiration Term		10 years
Vesting percentage of stock options granted per year		25.00%
Stock based compensation, vesting period		4 years
Vested Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense		$ 2,232,000	1,928,000
Stock based compensation, holding period		4 years
Vested Restricted Stock Awards | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of annual bonus settled with fully vested restricted stock unit awards		40.00%
Unvested Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense		$ 3,508,000	$ 3,256,000
Recipient age to expense award on grant date		59 years 6 months
Stock based compensation, vesting period		4 years

[1] The intrinsic value is calculated as the market value as of the end of the fiscal period. As reported by the NASDAQ Global Select Market, the market value as of March 30, 2018 was $78.65.