Leases (Summary of Lease Assets and Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Leases [Abstract]
Operating lease asset	$ 97,567	$ 108,229
Finance lease asset	10,433	10,982
Total lease assets	108,000	119,211
Operating lease liability, current	32,383	32,207
Finance lease liability, current	4,445	4,204
Total lease liabilities, current	36,828	36,411
Operating lease liability, noncurrent	91,640	105,768
Finance lease liability, noncurrent	16,811	19,031
Total lease liabilities, noncurrent	108,451	124,799
Total lease liabilities	$ 145,279	$ 161,210
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property and equipment, net of accumulated depreciation of $376,464 and $344,906	Property and equipment, net of accumulated depreciation of $376,464 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