Consolidated Statements of Shareholders' Equity Statement - 6 months ended Jun. 30, 2017 - USD ($) $ in Thousands	Total	Preferred Stock	Preferred Stock Including Additional Paid in Capital	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Balance, Preferred stock, Shares outstanding at Dec. 31, 2016	4,571,937	4,571,937
Balance, Common stock, shares outstanding at Dec. 31, 2016	49,153,463			49,153,463
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Shares, New Issues		776,721		20,431
Stock Issued During Period, Shares, Restricted Stock Award, Gross				138,166
Shares Paid for Tax Withholding for Share Based Compensation				(77,567)
Balance, Preferred stock, Shares outstanding at Jun. 30, 2017	5,348,658	5,348,658
Balance, Common stock, shares outstanding at Jun. 30, 2017	49,234,493			49,234,493
Balance at Dec. 31, 2016	$ 467,184		$ 110,005	$ 492	$ 727,369	$ (32,609)	$ (338,073)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issuance	18,351		18,212	0	139
Restricted stock granted, net of amortization	1,178			1	1,177
Adjustments for tax withholding on share-based compensation	(521)			(1)	(520)
Stock issuance costs	(93)		(52)		(41)
Net income	1,619						1,619
Dividends on preferred stock	(5,077)						(5,077)
Dividends on common stock	(17,718)						(17,718)
Other comprehensive income	32,352					32,352
Balance at Jun. 30, 2017	$ 497,275		$ 128,165	$ 492	$ 728,124	$ (257)	$ (359,249)