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Debt - Additional Information (Detail)
3 Months Ended 12 Months Ended
Jan. 12, 2016
Dec. 31, 2015
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Nov. 20, 2014
USD ($)
Jan. 06, 2012
USD ($)
Line of Credit Facility [Line Items]            
Company indebtedness   $ 7,000,000 $ 7,000,000 $ 0    
Second Amended and Restated Credit Agreement [Member]            
Line of Credit Facility [Line Items]            
Termination date of the Credit Agreement     Nov. 20, 2019      
Remaining available borrowing capacity   $ 93,000,000 $ 93,000,000      
Credit facility covenant terms     (a) Fixed Charge Coverage Ratio. The Fixed Charge Coverage Ratio is not permitted to be less than 1.5 to 1.0, measured as of the end of each Fiscal Quarter, commencing with the Fiscal Quarter ended September 30, 2014. (b) Consolidated Debt to Consolidated EBITDA Ratio. The Consolidated Debt to Consolidated EBITDA Ratio is not permitted to exceed 3.00 to 1.0 measured as of the end of each Fiscal Quarter (and in the case of Consolidated EBITDA, for the four-quarter period ending on such date).      
Third Amended And Restated Credit Agreement [Member]            
Line of Credit Facility [Line Items]            
Termination date of the Credit Agreement     Jan. 12, 2021      
Federal Funds Rate [Member] | Third Amended And Restated Credit Agreement [Member] | Subsequent Event [Member]            
Line of Credit Facility [Line Items]            
Interest rate 0.50%          
Eurodollar Rate Loans [Member] | Third Amended And Restated Credit Agreement [Member] | Subsequent Event [Member]            
Line of Credit Facility [Line Items]            
Interest rate 1.00%          
Third Amended Credit Agreement [Member] | Revolver Loans [Member]            
Line of Credit Facility [Line Items]            
Repayment of outstanding principal interest fee and cost due date     Jan. 12, 2021      
Revolving Credit Facility [Member]            
Line of Credit Facility [Line Items]            
Interest rate on the revolving credit facility   1.39% 1.39% 1.30%    
Revolving Credit Facility [Member] | Second Amended and Restated Credit Agreement [Member]            
Line of Credit Facility [Line Items]            
Outstanding borrowings under the revolver loans   $ 7,000,000 $ 7,000,000      
Revolving Credit Facility [Member] | Letter of Credit Facility Sublimit [Member]            
Line of Credit Facility [Line Items]            
Revolving loans in a collective maximum principal amount   15,000,000 15,000,000   $ 15,000,000  
Revolving Credit Facility [Member] | Swing Advance Loan Sublimit [Member]            
Line of Credit Facility [Line Items]            
Revolving loans in a collective maximum principal amount   $ 5,000,000 5,000,000   $ 5,000,000  
Revolving Credit Facility [Member] | Minimum [Member] | Second Amended and Restated Credit Agreement [Member]            
Line of Credit Facility [Line Items]            
Fixed charge coverage ratio as per credit agreement   1.5        
Revolving Credit Facility [Member] | Maximum [Member] | Second Amended and Restated Credit Agreement [Member]            
Line of Credit Facility [Line Items]            
Consolidated debt to earnings before interest taxes depreciation amortization ratio as per the credit agreement   3.0        
Revolver Loans Portion Effective January 1 through June 30 [Member] | Second Amended and Restated Credit Agreement [Member]            
Line of Credit Facility [Line Items]            
Revolving loans in a collective maximum principal amount   $ 150,000,000 150,000,000      
Revolver Loans Portion Effective January 1 through June 30 [Member] | Third Amended And Restated Credit Agreement [Member]            
Line of Credit Facility [Line Items]            
Revolving loans in a collective maximum principal amount   250,000,000 250,000,000      
Revolver Loans Portion Effective July 1 through December 31 [Member] | Second Amended and Restated Credit Agreement [Member]            
Line of Credit Facility [Line Items]            
Revolving loans in a collective maximum principal amount   100,000,000 100,000,000      
Revolver Loans Portion Effective July 1 through December 31 [Member] | Third Amended And Restated Credit Agreement [Member]            
Line of Credit Facility [Line Items]            
Revolving loans in a collective maximum principal amount   $ 200,000,000 $ 200,000,000      
Scenario, Previously Reported [Member] | Revolver Loans [Member]            
Line of Credit Facility [Line Items]            
Revolving loans in a collective maximum principal amount           $ 100,000,000