Quarterly report pursuant to Section 13 or 15(d)

Summary of Long-Term Debt (Detail)

v3.8.0.1
Summary of Long-Term Debt (Detail) - USD ($)
Sep. 30, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity $ 200,000,000  
Revolving credit facility [1] 57,000,000 $ 25,000,000
Second Lien Facility 200,000,000 0
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums 11,945,000 0
Debt Instrument, Unamortized Discount (4,000,000) 0
Unamortized Debt Issuance Expense (7,945,000) 0
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net 245,055,000 25,000,000
Long-term Debt 257,000,000 $ 25,000,000
Revolving Credit Facility    
Debt Instrument [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity $ 237,500,000  
[1] 2 Issuance costs of the Credit Facility, which represent costs attributable to the access to credit over it’s contractual term, have been presented as a component of Other assets (see Note 11) and are being amortized over the term of the Credit Facility using the straight-line method.