CONSOLIDATED BALANCE SHEETS (Parentheticals) - $ / shares shares in Thousands	Mar. 31, 2017	Dec. 31, 2016
Statement Of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized	350,000	350,000
Common stock, shares issued	196,761	196,142
Common stock, shares outstanding	196,761	196,142