Long-Term Debt - Schedule of Long-Term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Long-term debt, balance	$ 327,850	$ 460,000
Less discount and issuance costs	(24,338)	(31,717)
Long term debt, net of debt discount and issuance costs	303,512	428,283
Less current portion of long-term debt	(4,300)	(4,313)
Long-term debt, net of current portion, debt discount and issuance costs	299,212	423,970
Revolving credit facility
Debt Instrument [Line Items]
Long-term debt, balance	0	0
Term loan facility
Debt Instrument [Line Items]
Long-term debt, balance	$ 327,850	$ 460,000