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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Statement of Financial Position [Abstract]    
Accounts and notes receivable, allowances $ 21,043 $ 19,618
Property and equipment, accumulated depreciation $ 309,259 $ 270,105
Common stock, par value (in usd per share) $ 2 $ 2
Common stock, authorized (shares) 200,000,000 200,000,000
Common stock, issued (shares) 62,862,000 62,294,000
Common stock, outstanding (shares) 62,862,000 62,294,000