Debt and Other Obligations (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt and Other Obligations
Total debt before unamortized discount and debt issuance costs	$ 510,492	$ 507,201
Unamortized discount and debt issuance costs, net	(7,395)	(8,328)
Total debt	503,097	498,873
Total current portion of long-term debt	10,085	8,752
Long-term debt	493,012	490,121
Term Loan B
Debt and Other Obligations
Total debt before unamortized discount and debt issuance costs	491,113	496,163
Total current portion of long-term debt	5,050	5,050
Seller Notes
Debt and Other Obligations
Total debt before unamortized discount and debt issuance costs	11,510	9,005
Total current portion of long-term debt	4,060	3,175
Deferred payment obligation
Debt and Other Obligations
Total debt before unamortized discount and debt issuance costs	4,000
Finance lease liabilities and other
Debt and Other Obligations
Total debt before unamortized discount and debt issuance costs	3,869	2,033
Total current portion of long-term debt	$ 975	$ 527