Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Numerator:
Net income from continuing operations		$ 14,760	$ 6,768	$ 32,876	$ 10,335
Preferred stock dividends		(7,096)	(10,692)	(32,454)	(31,672)
Income (loss) from continuing operations attributable to common stockholders		7,664	(3,924)	422	(21,337)
Income (loss) income from a discontinued operation, net of taxes			699	281	(2,064)
Net income (loss) available to common shareholders		$ 7,664	$ (3,225)	$ 703	$ (23,401)
Denominator:
Basic EPS - weighted average common shares outstanding		41,476,116	41,195,047	41,374,188	41,141,281
Basic EPS:
Income (loss) from continuing operations		$ 0.19	$ (0.10)	$ 0.01	$ (0.52)
Income (loss) income from a discontinued operation, net of taxes			0.02	0.01	(0.05)
Net income (loss)		$ 0.19	$ (0.08)	$ 0.02	$ (0.57)
Denominator:
Dilutive EPS - weighted average common shares outstanding		41,819,422	41,195,047	41,717,494	41,141,281
Income (loss) from continuing operations		$ 0.19	$ (0.10)	$ 0.01	$ (0.52)
Income (loss) income from a discontinued operation, net of taxes			0.02	0.01	(0.05)
Net income (loss)		$ 0.19	$ (0.08)	$ 0.02	$ (0.57)
Potential dilutive effect of stock options and restricted common stock				539,000
Series A Preferred Stock
Denominator:
Cumulative dividend in arrears	$ 9,573