Income Taxes (Details Textual) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2008	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Minimum Percentage Of Ordinary Taxable Income To Stockholders				90.00%
Preferred Stock, Dividends, Per Share, Cash Paid			$ 0.50781
Total income tax benefit (provision)	$ 4,441	$ 2,107		$ 4,846	$ 3,419
Provision for taxes	0	0		2,515	0
Deferred Tax Assets, Net of Valuation Allowance, Total	$ 2,106			$ 2,106		$ 0