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Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance - January 1 $ (641,972) $ (559,026)  
Other comprehensive income (loss) before reclassifications (3) (6,408) (81,660)  
Amounts reclassified from AOCL 1,812 (1,286)  
Other comprehensive income (loss) (4,596) (82,946) $ 44,734
Balance - December 31 (646,568) (641,972) (559,026)
Net of tax (1,812) 1,286  
Foreign curency translation, taxes 3,735 (20,526) (875)
Foreign Currency Translation Items      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance - January 1 (554,683) (456,025)  
Other comprehensive income (loss) before reclassifications (3) 30,810 (98,658)  
Amounts reclassified from AOCL 0 0  
Other comprehensive income (loss) 30,810 (98,658)  
Balance - December 31 (523,873) (554,683) (456,025)
Net of tax 0 0  
Pension and other post-retirement effects      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance - January 1 (86,356) (101,665)  
Other comprehensive income (loss) before reclassifications (3) (37,218) 16,684  
Amounts reclassified from AOCL 1,692 (1,375)  
Other comprehensive income (loss) (35,526) 15,309  
Balance - December 31 (121,882) (86,356) (101,665)
Amount of settlement of reclassification adjustment from accumulated other comprehensive income (loss) 8 (75)  
Tax benefit (expense) 218 8,423  
Net of tax (1,692) 1,375  
Cash flow hedging activity (2)      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance - January 1 (933) (1,336)  
Other comprehensive income (loss) before reclassifications (3) 0 314  
Amounts reclassified from AOCL 120 89  
Other comprehensive income (loss) 120 403  
Balance - December 31 (813) (933) (1,336)
Net of tax (120) (89)  
Noncontrolling Interests      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Other comprehensive income (loss) (12,783) 1,253 (1,302)
Foreign currency translation adjustments, attributable to noncontrolling interest (7,000) 5,800 4,600
Noncontrolling Interests | Currency Swap      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Foreign curency translation, taxes   49,000 $ 17,700
Amortization of actuarial losses      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Reclassification from AOCI, before tax (1,310) (6,382)  
Prior service costs      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Reclassification from AOCI, before tax (608) (591)  
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Amounts reclassified from AOCL 120 89  
Reclassification from AOCI, before tax (120) (117)  
Tax benefit (expense) 0 (28)  
Net of tax $ (120) $ (89)