CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares shares in Thousands	Dec. 31, 2016	Dec. 31, 2015
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	623,201	621,057
Common stock, shares outstanding	566,566	608,700
Common stock in treasury, shares	56,635	12,357