Significant Accounting Policies (Details 2) (USD $)	6 Months Ended
	Jun. 30, 2013
Balance as of December 31, 2012 of credit losses on Retained CDO Bonds for which a portion of an OTTI was recognized in other comprehensive income	$ 0
Additions to credit losses:
On Retained CDO Bonds for which an OTTI was not previously recognized	1,682
On Retained CDO Bonds for which an OTTI was previously recognized and a portion of an other-than-temporary impairment was recognized in other comprehensive income	0
On Retained CDO Bonds for which an OTTI was previously recognized without any portion of other-than-temporary impairment recognized in other comprehensive income	0
Reduction for credit losses:
On Retained CDO Bonds for which no other-than-temporary impairment was recognized in other comprehensive income at current measurement date	0
On Retained CDO Bonds sold during the period	0
On Retained CDO Bonds charged off during the period	0
For increases in cash flows expected to be collected that are recognized over the remaining life of theRetained CDO Bonds	0
Balance as of June 30, 2013 of credit losses on Retained CDO Bonds for which a portion of an OTTI was recognized in other comprehensive income	$ 1,682