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Business Segment Information (Narrative) (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Segment Reporting Information [Line Items]        
Revenues $ 471,334,000 $ 485,322,000 $ 1,534,447,000 $ 1,416,659,000
Intersegment        
Segment Reporting Information [Line Items]        
Revenues $ 0 $ 0 $ 0 $ 0