Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Summary of Long-Term Debt (Details)

v3.19.1
Long-Term Debt - Summary of Long-Term Debt (Details) - USD ($)
3 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Sep. 29, 2017
Debt Instrument [Line Items]      
Document Period End Date Mar. 31, 2019    
Revolving credit facility $ 325,000,000 $ 321,000,000  
Second Lien Facility 200,000,000 200,000,000 $ 200,000,000
Long-term Debt 525,000,000 521,000,000  
Debt Instrument, Unamortized Discount (2,979,000) (3,159,000) (4,000,000)
Unamortized Debt Issuance Expense (6,102,000) (6,466,000) $ (8,200,000)
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net 515,919,000 511,375,000  
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums [1],[2] $ 9,081,000 $ 9,625,000  
[1] Discount and issuance costs of the Second Lien Facility are being amortized over the term of the underlying loan using the effective-interest method
[2] Issuance costs of the Credit Facility, which represent costs attributable to the access to credit over its contractual term, have been presented as a component of Other assets (see Note 10) and are being amortized over the term of the Credit Facility using the straight-line method.