CONSOLIDATED BALANCE SHEETS Parentheticals - $ / shares	Dec. 31, 2015	Dec. 31, 2014
Common stock, shares authorized	300,000,000	300,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares issued	178,284,137	177,362,600
Common stock, shares outstanding	177,893,562	177,215,816
Treasury stock, shares	390,575	146,784