Leases (Summary of Lease Assets and Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Leases [Abstract]
Operating lease asset	$ 81,783	$ 108,229
Finance lease asset	10,159	10,982
Total lease assets	91,942	119,211
Operating lease liability, current	32,313	32,207
Finance lease liability, current	4,509	4,204
Total lease liabilities, current	36,822	36,411
Operating lease liability, noncurrent	83,551	105,768
Finance lease liability, noncurrent	15,565	19,031
Total lease liabilities, noncurrent	99,116	124,799
Total lease liabilities	$ 135,938	$ 161,210
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property and equipment, net of accumulated depreciation of $390,887 and $344,906	Property and equipment, net of accumulated depreciation of $390,887 and $344,906
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Operating and Finance Lease, Liability, Current	Operating and Finance Lease, Liability, Current
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Operating and Finance Lease, Liability, Current	Operating and Finance Lease, Liability, Current
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Total lease liabilities, noncurrent	Total lease liabilities, noncurrent
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Total lease liabilities, noncurrent	Total lease liabilities, noncurrent