Preferred Stock Textuals (Details) (USD $)	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2011 Preferred Stock, No Voting Rights [Member]	Jun. 30, 2011 Preferred Stock, Voting Rights [Member]	Sep. 30, 2013 Series B - Non-Cumulative Perpetual Preferred Stock [Member]	Mar. 31, 2013 Series I - 5.80% Fixed-to-Floating Class A Preferred Stock [Member]	Jun. 30, 2011 Series I - 5.80% Fixed-to-Floating Class A Preferred Stock [Member]	Dec. 31, 2010 Series I - 5.80% Fixed-to-Floating Class A Preferred Stock [Member]
Preferred Stock (Textual) [Abstract]
Shares issued and outstanding	9,591,931	9,566,921		0			25,010	0
Preferred Stock, Shares Authorized			20,000,000	4,000,000
Preferred Stock Expected to be issued					$ 1,800,000,000	$ 2,500,000,000
Additional paid-in capital included related to preferred stock	$ 91,000,000	$ 45,000,000