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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
shares in Thousands
Mar. 31, 2017
Dec. 31, 2016
CONDENSED CONSOLIDATED BALANCE SHEETS    
Common stock, par value (in dollars per share) $ 0.005 $ 0.005
Common stock, shares authorized 1,250,000 1,250,000
Common stock, shares issued 624,405 623,201
Common stock, shares outstanding 567,769 566,566
Common stock in treasury, shares 56,636 56,635