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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Statement of Financial Position [Abstract]    
Receivables, allowance for doubtful accounts $ 38,113 $ 32,838
Other intangible assets, accumulated amortization $ 68,249 $ 156,879
Preferred stock, par value (in dollars per share) $ 0.10 $ 0.10
Preferred stock, authorized (in shares) 20,000,000 20,000,000
Preferred stock, issued (in shares) 0 0
Preferred stock, outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.10 $ 0.10
Common stock, authorized (in shares) 480,000,000 480,000,000
Common stock, issued (in shares) 179,232,000 179,380,000
Common stock, outstanding (in shares) 134,298,000 134,895,000
Treasury stock (in shares) 44,934,000 44,485,000