Subsequent Events - (Details) (USD $) In Millions, except Share data, unless otherwise specified				0 Months Ended		0 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Oct. 25, 2012 Credit Risk Reduction Plan Subsequent Event	Oct. 23, 2012 Series A Preferred Stock Subsequent Event Issuance of Equity	Oct. 23, 2012 Nonvoting Common Stock Subsequent Event Exchange of Equity	Oct. 23, 2012 Scenario, Forecast Series T Preferred Stock and Series T-ACB Preferred Stock Subsequent Event Exchange of Equity
Subsequent Event [Line Items]
Number of shares issued in Private Placement (in shares)				45,000
Value per share of shares sold in Private Placement (in dollars per share)				$ 1,000
Conversion price of convertible stock (in dollars per share)				$ 2.80
Proceeds from Private Placement				$ 41.8
Common stock, par value (in dollars per share)	$ 1	$ 1			$ 1
Value of stock converted						21
Estimated loss, maximum			40
Estimated losses, minimum			$ 45