Quarterly report pursuant to Section 13 or 15(d)

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

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Long-Term Debt - Summary of Long-Term Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Sep. 29, 2017
Debt Instrument [Line Items]      
Revolving credit facility $ 228,900 $ 314,400  
Second Lien Facility 146,860 200,000 $ 200,000
Long-term Debt, Gross 375,760 514,400  
Debt Instrument, Unamortized Discount (1,096) (1,604) (4,000)
Unamortized Debt Issuance Expense (3,602) (3,299) $ (8,200)
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net 371,062 509,497  
Long-term Debt, Current Maturities (7,500) 0  
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums [1],[2] 4,698 4,903  
Long-term Debt $ 363,562 $ 509,497  
[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] ssuance costs of the Credit Facility, which represent costs attributable to the access to credit over its contractual term, that 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.