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Equity Compensation Plans - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Apr. 27, 2012
Jun. 30, 2017
Jun. 30, 2016
Mar. 31, 2016
Jun. 30, 2017
Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock based compensation expense   $ 1,100,000 $ 900,000   $ 2,300,000 $ 2,100,000
Equity compensation costs capitalized as part of inventory         $ 0  
Stock options granted (shares)   0 0   0 18,300
Stock options exercised (shares)   16,300 9,313   28,464 27,639
Cash received from exercise of stock option   $ 200,000 $ 100,000   $ 300,000 $ 400,000
Number of options exercised, intrinsic value   700,000 $ 300,000   1,200,000 600,000
Intrinsic value of stock options exercised, tax benefit   100,000     $ 300,000 $ 100,000
Employee Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award, term         10 years  
Total unrecognized compensation cost   2,300,000     $ 2,300,000  
Weighted average expected amortization period         2 years 7 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   $ 4,400,000     $ 4,400,000  
Weighted average expected amortization period         2 years  
Unvested restricted stock awards (shares)   193,925     193,925  
Time Based Restricted Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Restricted shares granted (shares)   0 0 7,930 0  
Restricted shares vested (shares)   0 0 8,129 9,288  
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 7,380 108,600 65,087
Performance Based Restricted Stock Awards | Earnings Target in 2019            
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