Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Accrued Liabilities.
Employee accrued compensation expense	$ 11,873	$ 12,473
Other accrued liabilities	18,230	11,033
Accrued interest on debt	9,539	9,620
Total accrued liabilities	$ 39,642	$ 33,126