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Stock-based Compensation - Additional Information (Detail) - USD ($)
3 Months Ended
Apr. 20, 2016
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Feb. 17, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock-based compensation expense   $ 1,524,000 $ 1,386,000    
Stock-based compensation, capitalized   131,000 66,000    
Unrecognized compensation costs for all share-based payment arrangements   5,059,000      
Accrued expenses   32,678,000   $ 30,431,000  
Other non-current liabilities   3,401,000   3,684,000  
Time-Based Stock Appreciation Rights [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock-based compensation expense   154,000 $ 94,000    
Unrecognized compensation costs for all share-based payment arrangements   745,000      
Intrinsic value of SARs   $ 241,000      
Number of shares, granted   90,000 0    
Performance-Based Stock Appreciation Rights [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock-based compensation expense     $ 2,000    
Unrecognized compensation costs for all share-based payment arrangements   $ 0      
Intrinsic value of SARs   41,000      
Number of shares, granted     0    
Time-Based Restricted Stock Units [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock-based compensation expense   700,000 $ 562,000    
Unrecognized compensation costs for all share-based payment arrangements   $ 2,844,000      
Number of shares, granted   47,370      
Performance-Based Restricted Stock Units [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock-based compensation expense   $ 440,000 525,000    
Unrecognized compensation costs for all share-based payment arrangements   1,470,000      
Performance Units [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock-based compensation expense   $ 184,000 $ 203,000    
Maximum percentage of MPUs for senior executives   15.00%      
Fair value period of MPUs   3 years      
Accrued expenses   $ 352,000   715,000  
Other non-current liabilities   $ 91,000   $ 260,000  
Market Performance Units [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Term of MPUs   3 years      
2016 LTIP [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Number of shares authorized under the plan 6,949,400        
Number of shares available for grant   7,115,859      
2006 LTIP [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Number of shares authorized under the plan         1,949,400
ESPP [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Number of shares authorized under the plan 5,000,000        
Stock-based compensation expense   $ 46,000      
Maximum percentage deductible from employees' gross pay 10.00%        
Maximum amount deductible from employees gross pay $ 25,000        
ESPP [Member] | Maximum [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Maximum percentage of discount on common stock's fair market value 15.00%