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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands, shares in Millions
Sep. 30, 2016
Dec. 31, 2015
CONDENSED CONSOLIDATED BALANCE SHEETS    
Accounts and notes receivable, allowance for doubtful accounts (in dollars) $ 3,363 $ 2,710
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized 199.0 199.0
Common stock, shares issued 66.5 66.7
Treasury stock, shares 3.9 4.2