Shareholders' Equity (Details) (USD $)		3 Months Ended		1 Months Ended
Shareholders' Equity (Details) (USD $)	Mar. 31, 2013	Mar. 31, 2013 Preferred Stock	Jan. 31, 2013 Preferred Stock Centerbridge	Feb. 28, 2013 Preferred Stock Wells Fargo Investment Holdings, LLC
Preferred equity investment
Number of shares of preferred stock provided with the right to exchange as per the Exchange Agreement		9,750
Ceiling price at which the shares of preferred stock are redeemable at maturity		$ 67
Repurchase price of preferred stock (in dollars per share)		$ 67
Ownership interest in Spin-Off entity (as a percent)	9.90%
Number of shares authorized to be repurchased			2,300
Repurchase of Preferred Stock (in shares)				225

The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer.

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- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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