Shareholders' Equity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended	9 Months Ended			3 Months Ended			9 Months Ended
	Dec. 11, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2013 Series B Preferred Stock [Member]	Dec. 31, 2012 Series B Preferred Stock [Member]	Sep. 30, 2012 Series B Preferred Stock [Member]	Sep. 30, 2013 Series B Preferred Stock [Member]	Sep. 30, 2012 Series B Preferred Stock [Member]	Sep. 30, 2013 More Than Four And One Half Years After Issuance [Member]
Class of Stock [Line Items]
Aggregate purchase price of preferred stock sold to treasury		$ 25,000		$ 25,000
Preferred stock, dividend rate (fixed)										9.00%
Quarterly lending incentive fee										0.50%
Annual dividend rate					1.00%	1.00%	1.00%	1.00%	1.71%
Dividends Payable, Date Declared		Oct. 08, 2013
Common stock dividend distribution date	Dec. 11, 2012	Dec. 10, 2013
Common stock dividends, shares percentage	5.00%	5.00%
Common stock stock dividend, shares	211,564	226,451	212,008