Repurchase Agreements - Amounts At Risk (Details) (Citigroup Global Markets, Inc., USD $)	12 Months Ended
	Dec. 31, 2013
Citigroup Global Markets, Inc.
Repurchase Agreement Counterparties With Whom Amount At Risk Exceeds Ten Percent of Stockholders Equity [Line Items]
Amount At Risk	$ 5,487,000
Weighted Average Maturity of Repurchase Agreement in Days	11 days
Percentage of Stockholders' Equity at Risk	12.30%