Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Schedule of Long-term Debt, Net of Unamortized Debt Issuance Costs (Details)

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Long-Term Debt - Schedule of Long-term Debt, Net of Unamortized Debt Issuance Costs (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Debt Disclosure [Abstract]    
Senior notes $ 99,943 $ 99,931
Revolving credit facility 0 0
Total long-term debt 99,943 99,931
Less: Current maturities 0 0
Total maturities due after one year $ 99,943 $ 99,931