INCOME TAXES - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deferred income tax assets:
Insurance and claims accruals	$ 57,666	$ 57,168
Compensation-related accruals	10,146	9,931
Allowance for uncollectible accounts	1,918	2,797
Operating lease liabilities	12,484	8,733
Other	3,589	2,235
Gross deferred income tax assets	85,803	80,864
Deferred income tax liabilities:
Property and equipment	305,089	351,352
Investments in equity securities	14,109	12,240
Prepaid expenses	6,391	7,118
Operating lease right-of-use assets	12,028	8,327
Investment in partnership	14,805	18,790
Other	2,897	3,217
Gross deferred income tax liabilities	355,319	401,044
Net deferred income tax liability	$ 269,516	$ 320,180