CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	280,000,000	280,000,000
Common stock, shares issued (in shares)	146,415,000	145,871,000
Common Stock, Shares, Outstanding	138,985,000	143,486,000
Treasury stock shares (in shares)	7,430,000	2,385,000
Tax effect of accumulated other comprehensive income	$ (1)	$ 0