Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accrued Liabilities Detail [Table]
Compensation and employee benefits	$ 14,336	$ 18,657
Operating lease liabilities, current portion	8,795	9,144
Accrued taxes	4,323	6,894
Accrued interest	2,951	299
Accrued capital expenditures	194	978
8192000	8,192	8,883
Total accrued liabilities and other	$ 38,791	$ 44,855
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrentAndNoncurrent	us-gaap:AccruedLiabilitiesCurrentAndNoncurrent