Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accrued Liabilities [Abstract]
Accrued insurance costs	$ 89,621	$ 94,744
Deferred revenue	71,376	61,066
Taxes other than income	49,708	48,038
Accrued compensation	46,750	48,027
Accrued dividends	27,801	17,003
Accrued legal settlement	22,500	5,440
Accrued interest payable	11,993	1,041
Deferred compensation	10,349	9,437
Accrued other	32,610	35,787
Accrued liabilities	$ 362,708	$ 320,583