Equity Compensation Plans - Additional Information (Detail) - USD ($)		3 Months Ended
	Apr. 27, 2012	Mar. 31, 2017	Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense		$ 1,200,000	$ 1,100,000
Equity compensation costs capitalized as part of inventory		$ 0
Stock options granted (shares)		0	18,300
Stock options exercised (shares)		12,164	18,326
Cash received from exercise of stock option		$ 200,000	$ 300,000
Number of options exercised, intrinsic value		500,000	300,000
Intrinsic value of stock options exercised, tax benefit		$ 200,000	$ 100,000
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award, term		10 years
Total unrecognized compensation cost		$ 2,600,000
Weighted average expected amortization period		2 years 9 months 10 days
Employee Stock Option | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award, vesting period		3 years
Employee Stock Option | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award, vesting period		4 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost		$ 5,100,000
Weighted average expected amortization period		2 years 2 months
Unvested restricted stock awards (shares)		195,365
Time Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (shares)		0	7,930
Restricted shares vested (shares)		9,288	8,129
Time Based Restricted Stock | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award, vesting period		2 years
Time Based Restricted Stock | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award, vesting period		4 years
Performance Based Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (shares)			7,380
Restricted shares vested (shares)		108,600	65,087
Performance Based Restricted Stock Awards | Earnings Target in 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (shares)		18,100
Stock Option Plan 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share options and restricted shares authorized (shares)	1,750,000
Additional shares authorized under the plan (shares)	1,200,000