Income Taxes - Sources of Temporary Differences (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax liabilities:
Fixed assets	$ (36,572)	$ (32,551)
Operating and Finance lease right-of-use assets	(6,831)	(6,610)
Other	(37)	(48)
State deferred taxes	(4,564)	(3,607)
Captive insurance subsidiary	(10,760)	0
Total deferred tax liabilities	(58,764)	(42,816)
Deferred tax assets:
Captive insurance subsidiary	509	335
Accrued liabilities	3,015	2,541
Stock compensation	3,961	3,467
Operating and Finance lease liabilities	9,013	8,418
Other	502	48
State deferred taxes	2,581	5,232
Total deferred tax assets	19,581	20,041
Valuation allowance	0	(1,148)
Net deferred income tax liabilities	$ (39,183)	$ (23,923)