Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information Credit Agreement (Detail)

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Commitments and Contingencies - Additional Information Credit Agreement (Detail) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Line of Credit Facility [Line Items]        
Senior secured revolving credit facility maximum borrowing capacity $ 60,000,000   $ 60,000,000  
Revolving credit facility maturity date     Jun. 01, 2019  
Date the Company entered into a Credit Agreement     Jun. 18, 2014  
Credit agreement date     Jun. 01, 2014  
Standby letters of credit borrowing capacity 10,000,000   $ 10,000,000  
Standby letters of credit, utilized amount 533,000   $ 533,000  
Credit facility interest rate description     Credit Facility will bear interest, at the Company's option, at either the (i) Base Rate (defined as the highest of (a) the Bank's prime rate, (b) the Federal Funds Rate plus 1.5% and (c) one-month LIBOR plus 1.5%), or (ii) at a variable rate between 0.875% and 1.125% above LIBOR, based upon the total funded debt to EBITDA ratio.  
LIBOR rate duration period     1 month  
Debt description of variable rate basis     One-month LIBOR plus 1.5%  
Credit agreement, unused capacity, commitment fee percentage     0.10%  
Interest expense 380,000 $ 380,000 $ 1,155,000 $ 1,349,000
Credit agreement, amount outstanding 0   $ 0  
Credit facility covenants     (i) an EBITDAR Coverage Ratio (as defined in the Credit Agreement) of not less than 1.251.0 as of each quarter end and (ii) total funded debt to EBITDA not greater than 2.01.0  
Minimum EBITDAR coverage ratio     125.00%  
Maximum Total Funded Debt to EBITDA ratio     200.00%  
Credit agreement, pledge percentage     100.00%  
Compliance description     As of September 30, 2016, the Company was in compliance with all financial and non-financial covenants.  
Variable Rate Above (LIBOR) [Member]        
Line of Credit Facility [Line Items]        
Base spread on variable rate     1.50%  
Federal Funds Rate [Member]        
Line of Credit Facility [Line Items]        
Base spread on variable rate     1.50%  
Credit Agreement [Member]        
Line of Credit Facility [Line Items]        
Interest expense $ 29,000 $ 32,000 $ 88,000 $ 100,000
Minimum [Member] | Variable Rate Above (LIBOR) [Member]        
Line of Credit Facility [Line Items]        
Base spread on variable rate     0.875%  
Maximum [Member] | Variable Rate Above (LIBOR) [Member]        
Line of Credit Facility [Line Items]        
Base spread on variable rate     1.125%