Debt - Schedule of Long-term Debt Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Mar. 31, 2020
Debt Instrument [Line Items]
Total debt	$ 333,875	$ 347,562
Less: Debt issuance costs	(5,908)	(7,421)
Total debt, net of debt issuance costs	327,967	340,141
Less: Current maturities	(18,250)	(18,250)
Total debt, net of current maturities	309,717	321,891
Credit Agreement, Amendment 1 | Term Loan
Debt Instrument [Line Items]
Total debt	219,000	228,000
Credit Agreement, Amendment 1 | Delayed Draw Term Loan (DDTL)
Debt Instrument [Line Items]
Total debt	$ 114,875	$ 119,562	$ 65,000