Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 15, 2021	Dec. 31, 2020
Senior Notes
Liabilities:
Carrying amount	$ 310,000	$ 310,000
Level 2 | Senior Notes
Liabilities:
Long-term debt	337,993
First Lien Credit Facility
Liabilities:
Carrying amount			$ 312,500
First Lien Credit Facility | Term Loan
Liabilities:
Carrying amount			312,500
First Lien Credit Facility | Level 2 | Term Loan
Liabilities:
Long-term debt			287,500
Senior Credit Facility
Liabilities:
Carrying amount			30,000
Senior Credit Facility | Term Loan
Liabilities:
Carrying amount			30,000
Senior Credit Facility | Level 3 | Term Loan
Liabilities:
Long-term debt			30,000
Estimate of Fair Value | Senior Notes
Liabilities:
Long-term debt	$ 337,993
Estimate of Fair Value | First Lien Credit Facility | Term Loan
Liabilities:
Long-term debt			287,500
Estimate of Fair Value | Senior Credit Facility | Term Loan
Liabilities:
Long-term debt			$ 30,000