Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Components of deferred tax assets and liabilities
Allowance for doubtful accounts	$ 5,882	$ 4,229
Insurance and claims reserves	29,038	20,023
Compensation and employee benefits	7,181	7,883
Net operating loss and credit carryforwards	38,532	32,822
Capital loss carryforward	4,780	4,985
Interest expense limitation carryforwards	4,523	115
Finance lease obligations	1,885	705
Operating lease liabilities	82,855	72,751
Unrealized gain on investments	985
Other	883	355
Valuation allowance	(5,420)	(5,694)	$ (6,022)	$ (6,393)
Total deferred tax assets	171,124	138,174
Property and equipment	87,686	78,833
Intangibles	6,946	6,965
Prepaid license fees	1,609	1,894
Right of use assets	82,854	72,750
Unrealized gain on investments		1,708
Other	578	325
Total deferred tax liabilities	179,673	162,475
Net deferred tax liability	$ 8,549	$ 24,301