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Stock-based Compensation - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
May 22, 2014
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Document Period End Date       Jun. 30, 2017  
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense   $ 819 $ 831 $ 1,466 $ 1,568
Restricted Stock Units [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Pre-tax unrecognized compensation expense   6,300   $ 6,300  
Expected time to be recognized       2 years 2 months 12 days  
Performance Stock Units [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Pre-tax unrecognized compensation expense   $ 3,200   $ 3,200  
Expected time to be recognized       2 years 1 month 6 days  
Performance Stock Units [Member] | Executive Officer [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Performance stock units vesting period       3 years  
Performance Stock Units [Member] | Chief Executive Officer [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Performance stock units vesting period       2 years  
Performance Stock Units [Member] | Minimum [Member] | Executive Officer [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Performance stock units, variation percentage       0.00%  
Performance Stock Units [Member] | Maximum [Member] | Executive Officer [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Performance stock units, variation percentage       200.00%  
2012 Program [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares authorized or reserved for issuance with respect to awards granted   1,300,000   1,300,000  
Increase in number of shares of common stock reserved for issuance 700,000        
Number of stock awards issued under 2012 Program       1,744,266  
Shares available for future awards   656,372   656,372  
Number of forfeited awards under 2012 Program       400,638  
Labor and Related Expenses [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost   $ 1,738 1,506 $ 3,378 3,337
General and Administrative Expense [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost   $ 338 $ 563 $ 338 $ 563