Components of Accumulated Other Comprehensive Loss (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Revenues	$ 1,889,065	$ 1,848,399	$ 1,534,033
Interest expense	(75,156)	(63,235)	(58,196)
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax			20,350
Total costs and expenses	1,946,408	1,760,023	1,537,339
Income from continuing operations before income taxes	(122,958)	37,506	(54,220)
Income Tax Expense (Benefit)	10,381	9,089	(8,673)
Net income (loss)	176,431	(2,729)	21,975
Other Operating Income (Expense), Net	(4,737)	3,722	$ (10,072)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Total costs and expenses	18,389	24,167
Income Tax Expense (Benefit)	(1,218)	(1,432)
Net income (loss)	17,171	22,735
Reclassification out of Accumulated Other Comprehensive Income [Member] | Settlement/curtailment gain
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Pension and Other Postretirement Benefits Cost (Reversal of Cost)	(33)	0
Reclassification out of Accumulated Other Comprehensive Income [Member] | Settlement/curtailment gain | Discontinued Operations
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Pension and Other Postretirement Benefits Cost (Reversal of Cost)	96	(72)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Actuarial losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Pension and Other Postretirement Benefits Cost (Reversal of Cost)	17,792	23,657
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income Tax Expense (Benefit)	(960)	(970)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Pension and Other Postretirement Benefits Cost (Reversal of Cost)	534	582
Reclassification out of Accumulated Other Comprehensive Income [Member] | Foreign currency exchange forward contracts | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Revenues	(1,746)	(129)
Income from continuing operations before income taxes	2,499	3,345
Net income (loss)	1,539	2,375
Reclassification out of Accumulated Other Comprehensive Income [Member] | Interest rate swaps | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Interest expense	$ (4,245)	$ (3,474)