Leases (Schedule of Assets and Liabilities Balance Related to Finance and Operating Leases) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Leases [Abstract]
Finance lease right-of-use assets	$ 1,638	$ 1,749
Operating lease right-of-use assets	11,216	13,013
Finance lease obligations, current portion	355	498
Finance lease obligations, non-current portion	1,253	1,295
Total finance lease obligations	1,608	1,793
Operating lease obligations, current portion	2,696	2,842
Operating lease obligations, non-current portion	8,604	10,689
Total operating lease obligations	$ 11,300	$ 13,531
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, plant and equipment, net of accumulated depreciation of $380,363 and $381,584	Property, plant and equipment, net of accumulated depreciation of $380,363 and $381,584
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other long-term assets	Other long-term assets
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other accrued liabilities	Other accrued liabilities
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other long-term liabilities	Other long-term liabilities
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other accrued liabilities	Other accrued liabilities
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other long-term liabilities	Other long-term liabilities