Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, shares authorized	35,000,000	35,000,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	50,000,000	50,000,000
Common Stock, shares issued	27,636,853	24,046,977
Common Stock, shares outstanding	25,849,876	22,324,093
Treasury stock, shares	1,786,977	1,722,884
Series B Convertible Preferred Stock [Member]
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, shares authorized	5,000,000	5,000,000
Preferred Stock, shares issued	1,644,768	1,648,185
Preferred Stock, shares outstanding	1,644,768	1,648,185
Liquidation preference	$ 10,443	$ 9,877