CONSOLIDATED BALANCE SHEETS PARENTHETICAL (Parentheticals) - $ / shares	Dec. 31, 2016	Dec. 31, 2015
Common stock, par or stated value per share	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common Stock, shares issued	51,957,840	51,788,961
Common Stock, shares outstanding	48,331,675	48,172,158
Preferred stock, par or stated value per share	$ 0.01	$ 0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred Stock, shares issued	0	0