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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Statement of Financial Position [Abstract]    
Receivables, allowance for doubtful accounts $ 39,543 $ 43,455
Other intangible assets, accumulated amortization $ 87,486 $ 61,405
Preferred stock, par value (in dollars per share) $ 0.10 $ 0.10
Preferred stock, shares authorized (in shares) 20,000,000 20,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.10 $ 0.10
Common stock, shares authorized (in shares) 480,000,000 480,000,000
Common stock, shares issued (in shares) 179,006,000 178,784,000
Common stock shares outstanding (in shares) 141,258,000 143,455,000
Treasury stock, shares (in shares) 37,748,000 35,329,000