Income Taxes (Components Of Net Deferred Tax Asset (Liability) ) (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Accrued liabilities	$ 12,282	$ 4,112
Allowance for doubtful accounts	16,733	6,911
Claims accrual	127,850	85,573
Capital loss carryforward	6,518	0
Deferred revenue	5,358	6,366
Interest expense limitation carryforwards	18,530	0
Lease reserve	7,900	494
Net operating loss and credit carryforwards	54,173	2,357
Stock amortization	8,947	8,840
Operating Lease liabilities	120,782	45,089
Vacation accrual	6,430	4,410
Research and development	7,717	5,421
Unrealized gain/loss on investment	0	11,815
Other	6,310	4,361
Total deferred tax assets	399,530	185,749
Valuation allowance	(10,435)	0
Total deferred tax assets, net	389,095	185,749
Deferred tax liabilities:
Intangible assets	(430,948)	(342,559)
Property and equipment, principally due to differences in depreciation	(766,053)	(677,010)
Prepaid taxes, licenses, and permits deducted for tax purposes	(19,936)	(17,081)
Operating lease right-of-use assets	(118,152)	(45,083)
Foreign accruals	(3,760)	(8,616)
Other	(1,995)	(3,293)
Total deferred tax liabilities	(1,340,844)	(1,093,642)
Deferred income taxes	$ (951,749)	$ (907,893)