Equity Compensation Plans - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended
	Apr. 27, 2012	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense		$ 1,000,000	$ 800,000	$ 3,100,000	$ 2,300,000
Equity compensation costs capitalized as part of inventory		$ 0	$ 0	$ 0	$ 0
Stock options granted (shares)		0	0	18,300	0
Stock options exercised (shares)		18,863	16,275	46,502	118,321
Cash received from exercise of stock option		$ 200,000	$ 100,000	$ 600,000	$ 1,200,000
Number of options exercised, intrinsic value		700,000	300,000	1,300,000	2,300,000
Intrinsic value of stock options exercised, tax benefit		200,000	$ 100,000	$ 300,000	$ 700,000
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award, term				10 years
Award, vesting period				4 years
Total unrecognized compensation cost		2,100,000		$ 2,100,000
Weighted average expected amortization period				2 years 8 months 10 days
Employee Stock Option | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award, vesting period				3 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost		$ 3,400,000		$ 3,400,000
Weighted average expected amortization period				1 year 9 months 18 days
Unvested restricted stock awards (shares)		266,363		266,363
Time Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (shares)		8,570	18,000	16,500	18,000
Restricted shares vested (shares)		6,000		14,129	14,071
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)			0		0
Restricted shares vested (shares)		0	0	65,087	0
Earnings Target in 2018 | Performance Based Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (shares)		0		7,380
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