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Business Segments - Reconciliation of Segment Operating Earnings to Operating Income (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2022
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Segment Reporting [Abstract]        
Segment operating earnings   $ 466,121,000 $ 489,305,000 $ 405,835,000
Impairment charges   (6,530,000) (7,588,000) (3,163,000)
Impairment charges $ (93,000,000) 0 0 (93,000,000)
Non-operating and administrative expenses   (203,956,000) (206,398,000) (196,620,000)
Depreciation of corporate assets and amortization   (60,929,000) (60,824,000) (60,748,000)
Operating income   194,706,000 214,495,000 52,304,000
Other income (expense), net   1,354,000 (10,672,000) (12,607,000)
Interest expense, net   (41,002,000) (50,699,000) (32,579,000)
Income before taxes and equity in net income of associated companies   $ 155,058,000 $ 153,124,000 $ 7,118,000