Lease Accounting (Lease Balances by Major Categories) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Operating Leased Assets [Line Items]
Total Right of Use Assets, net	$ 125,277	$ 140,796
Accrued liabilities, current	17,978	19,966
Other long-term liabilities, non-current	113,844	121,854
Present value of operating lease liabilities	$ 131,822	$ 141,820
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	$ 65,375	$ 79,784
Present value of operating lease liabilities	64,712
Office Space and Equipment
Operating Leased Assets [Line Items]
Total Right of Use Assets, net	7,238	5,981
Present value of operating lease liabilities	12,475
Facilities and Equipment
Operating Leased Assets [Line Items]
Total Right of Use Assets, net	52,664	$ 55,031
Present value of operating lease liabilities	$ 54,635