Debt Obligations - Summary of Debt Obligations (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Line of Credit Facility [Line Items]
Total debt before deferred financing costs	$ 321,750	$ 348,637
Deferred financing costs	(3,445)	(5,079)
Total debt	318,305	343,558
Less: Current portion of long-term debt	(1,125)	(844)
Long-term debt	317,180	342,714
Senior Notes
Line of Credit Facility [Line Items]
Total debt before deferred financing costs	320,343	346,668
Magnum Promissory Notes
Line of Credit Facility [Line Items]
Total debt before deferred financing costs	$ 1,407	$ 1,969