Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Numerator:
Net income from continuing operations	$ (4,013)	$ 4,026	$ (328)	$ 5,714	$ (1,615)	$ 14,760	$ 12,155	$ 5,960	$ 5,399	$ 31,261	$ 15,972
Preferred stock dividends					(94)	(7,096)	(12,747)	(12,611)		(32,548)	(44,477)
Income (loss) from continuing operations attributable to common stockholders									5,399	(1,287)	(28,505)
Income income from a discontinued operation, net of taxes										(398)	(2,670)
Income attributable to common stockholders	$ (4,013)	$ 4,026	$ (328)	$ 5,714	$ (2,388)	$ 7,664	$ (592)	$ (6,370)	$ 5,399	$ (1,685)	$ (31,175)
Denominator:
Basic EPS - weighted average common shares outstanding									55,827,409	44,816,263	41,199,246
Dilutive EPS - weighted average common shares outstanding									56,203,789	44,816,263	41,199,246
Basic and Diluted EPS:
Earnings from continuing operations	$ (0.07)	$ 0.07	$ (0.01)	$ 0.10	$ (0.03)	$ 0.19	$ (0.02)	$ (0.16)	$ 0.10	$ (0.03)	$ (0.69)
Earnings from a discontinued operation, net of taxes					(0.01)			0.01		(0.01)	(0.07)
Total basic and diluted earnings per share	$ (0.07)	$ 0.07	$ (0.01)	$ 0.10	$ (0.04)	$ 0.19	$ (0.02)	$ (0.15)	$ 0.10	$ (0.04)	$ (0.76)
Potentially dilutive effect of outstanding stock options
Potential dilutive effect of share-based compensation excluded (in shares)									1,327,818	1,257,450	627,000