Other Real Estate Owned (Narrative) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended
	Jul. 31, 2011	Dec. 31, 2012
Real Estate Properties [Line Items]
Percentage covered up to $467.2 million		0.00%
Losses Up To $275.0 [Member]
Real Estate Properties [Line Items]
Loss sharing agreements amount, 80% on assets acquired	$ 275.0	$ 275.0
80% reimbursement for loss on acquisition		80
Loss sharing reimbursement threshold	80.00%	80.00%
Losses In Excess Of $275.0 Up To $467.2 [Member]
Real Estate Properties [Line Items]
Zero percent for losses on acquisition	467.2	467.2
Percentage covered up to $467.2 million		0.00%
Losses In Excess Of $467.2 [Member]
Real Estate Properties [Line Items]
Loss sharing agreements amount, 80% on assets acquired		$ 467.2
Percentage covered in excess of $467.2 million		80.00%
80% reimbursement for loss on acquisition		80