Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Numerator:
Net income from continuing operations	$ (1,615)	$ 14,760	$ 12,155	$ 5,960	$ 5,638	$ 6,768	$ 3,070	$ 496	$ 31,261	$ 15,972	$ 11,199
Preferred stock dividends	(94)	(7,096)	(12,747)	(12,611)	(12,805)	(10,692)	(10,548)	(10,432)	(32,548)	(44,477)	(35,268)
Income (loss) from continuing operations attributable to common stockholders									(1,287)	(28,505)	(24,069)
Income (loss) income from a discontinued operation, net of taxes	(679)			281	(606)	699	(1,167)	(1,596)	(398)	(2,670)	(2,612)
Net income (loss) attributable to common stockholders	$ (2,388)	$ 7,664	$ (592)	$ (6,369)	$ (7,773)	$ (3,225)	$ (8,645)	$ (11,532)	$ (1,685)	$ (31,175)	$ (26,681)
Denominator:
Basic EPS - weighted average common shares outstanding									44,816,263	41,199,246	41,072,350
Dilutive EPS - weighted average common shares outstanding									44,816,263	41,199,246	41,072,350
Basic and Diluted EPS:
Loss from continuing operations	$ (0.03)	$ 0.19	$ (0.02)	$ (0.16)	$ (0.17)	$ (0.10)	$ (0.18)	$ (0.24)	$ (0.03)	$ (0.69)	$ (0.59)
Loss from a discontinued operation, net of taxes	(0.01)			0.01	(0.01)	0.02	(0.03)	(0.04)	(0.01)	(0.07)	(0.06)
Total basic and diluted loss per share	$ (0.04)	$ 0.19	$ (0.02)	$ (0.15)	$ (0.18)	$ (0.08)	$ (0.21)	$ (0.28)	$ (0.04)	$ (0.76)	$ (0.65)
Potentially dilutive effect of outstanding stock options
Potential dilutive effect of stock options excluded (in shares)									1,257,450	627,000	649,000
Series A Preferred Stock
Potentially dilutive effect of outstanding stock options
Cumulative dividend in arrears										$ 191,208