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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
shares in Thousands, $ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Current assets:    
Allowance for doubtful accounts $ 83,513 $ 83,062
Contract asset, allowance for doubtful accounts 4,867 5,819
Accumulated depreciation on property, plant and equipment 1,133,913 1,172,957
Other assets, allowance for credit loss $ 66,879 $ 66,377
Shareholders’ equity:    
Common shares, par value (in dollars per share) $ 1.25 $ 1.25
Common shares, shares authorized (in shares) 305,000 305,000
Common shares, shares issued (in shares) 176,793 176,793
Treasury shares (in shares) 45,893 46,359