Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Claims and insurance reserves	$ 28,863	$ 28,390
Accrued vacation	15,867	17,642
Deferred compensation	43,134	42,417
Other	29,451	11,843
Total deferred tax assets	117,315	100,292
Depreciation and amortization	(330,751)	(354,762)
Other	(3,640)	(3,617)
Total deferred tax liabilities	(334,391)	(358,379)
Net deferred tax liability	$ (217,076)	$ (258,087)