Comprehensive Income (Loss) Components of AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance	$ (7,310)	$ (7,269)
Other comprehensive loss before reclassifications	(8)	(57)
Interest rate contracts, amount of gain reclassified from AOCL into income	(452)	(452)
Amounts reclassified from AOCL	(982)	(436)
Net current-period other comprehensive income (loss)	(538)	(41)	$ 2,379
Ending Balance	(7,848)	(7,310)	(7,269)
Foreign Currency Translation
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance	1,443	1,500
Other comprehensive loss before reclassifications	(8)	(57)
Interest rate contracts, amount of gain reclassified from AOCL into income	0	0
Amounts reclassified from AOCL	0	0
Net current-period other comprehensive income (loss)	(8)	(57)
Ending Balance	1,435	1,443	1,500
Pension and Postretirement Medical Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance	1,524	(1,960)
Other comprehensive loss before reclassifications	0	0
Interest rate contracts, amount of gain reclassified from AOCL into income	0	0
Amounts reclassified from AOCL	(982)	(436)
Net current-period other comprehensive income (loss)	(982)	(436)
Ending Balance	542	1,524	(1,960)
Interest Rate Derivative Instruments Designated as Cash Flow Hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance	(10,277)	(10,729)
Other comprehensive loss before reclassifications	0	0
Interest rate contracts, amount of gain reclassified from AOCL into income	(452)	(452)
Amounts reclassified from AOCL	0	0
Net current-period other comprehensive income (loss)	452	452
Ending Balance	$ (9,825)	$ (10,277)	$ (10,729)