Leases (Schedule of Assets and Liabilities Balance Related to Finance and Operating Leases) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Leases [Abstract]
Finance lease right-of-use assets	$ 1,477	$ 1,749
Operating lease right-of-use assets	12,487	13,013
Finance lease obligations, current portion	345	498
Finance lease obligations, non-current portion	1,147	1,295
Total finance lease obligations	1,492	1,793
Operating lease obligations, current portion	2,933	2,842
Operating lease obligations, non-current portion	9,752	10,689
Total operating lease obligations	$ 12,685	$ 13,531
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, plant and equipment, net of accumulated depreciation of $391,898 and $381,584	Property, plant and equipment, net of accumulated depreciation of $391,898 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