Quarterly report pursuant to Section 13 or 15(d)

Subsequent Event - Additional Information (Detail)

v3.7.0.1
Subsequent Event - Additional Information (Detail) - Second Amended and Restated Loan Agreement [Member]
Aug. 23, 2017
USD ($)
Subsequent Event [Line Items]  
Interest rate on outstanding borrowing under facility London Interbank Offered Rate plus 1.25%
Subsequent Event [Member]  
Subsequent Event [Line Items]  
Loan Agreement maturity date Aug. 23, 2022
Additional credit available under the revolving facility with consent by each lender and other conditions $ 50,000,000
Percentage of unused Line of Credit Facility Fee 0.20%
Subsequent Event [Member] | London Interbank Offered Rate (LIBOR) [Member]  
Subsequent Event [Line Items]  
Outstanding borrowings interest spread over the London Interbank Offered Rate 1.25%
Subsequent Event [Member] | Minimum [Member]  
Subsequent Event [Line Items]  
Fixed charge coverage ratio 100.00%
Subsequent Event [Member] | Revolving Credit Facility [Member]  
Subsequent Event [Line Items]  
Credit facility, maximum borrowing capacity $ 400,000,000
Subsequent Event [Member] | Subfacility for Standby Letters of Credit [Member]  
Subsequent Event [Line Items]  
Credit facility, maximum borrowing capacity $ 20,000,000