Lease Accounting (Lease Balances by Major Categories) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Operating Leased Assets [Line Items]
Total Right of Use Assets, net	$ 240,341	$ 125,277
Accrued liabilities, current	29,869	17,978
Other long-term liabilities, non-current	214,946	113,844
Present value of operating lease liabilities	$ 244,815	$ 131,822
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued liabilities	Accrued liabilities
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	OTHER LONG-TERM LIABILITIES	OTHER LONG-TERM LIABILITIES
Transportation equipment
Operating Leased Assets [Line Items]
Total Right of Use Assets, net	$ 115,689	$ 65,375
Present value of operating lease liabilities	111,627
Office Space and Equipment
Operating Leased Assets [Line Items]
Total Right of Use Assets, net	9,014	7,238
Present value of operating lease liabilities	15,081
Facilities and Equipment
Operating Leased Assets [Line Items]
Total Right of Use Assets, net	115,638	$ 52,664
Present value of operating lease liabilities	$ 118,107