Consolidated Balance Sheets (Parentheticals) (USD $) In Millions, except Share data, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Covered Loans Loss Share Receivable	$ 152.60	$ 205.70	$ 239.40
Other Assets, Noncurrent	$ 0.3	$ 1.3	$ 5.1
Common Stock, No Par Value	$ 0	$ 0	$ 0
Common Stock, Shares Authorized	300,000,000	300,000,000	300,000,000
Common Stock, Shares, Issued	115,121,731	115,121,731	115,121,731
Preferred Stock, No Par Value	$ 0	$ 0	$ 0
Preferred Stock, Shares Authorized	7,000,000	7,000,000	7,000,000
Preferred Stock, Shares Subscribed but Unissued	7,000,000	7,000,000	7,000,000
Treasury Stock, Shares	5,481,058	5,870,923	5,880,692
Series A Preferred Stock [Member]
Preferred Stock, No Par Value	$ 0	$ 0	$ 0
Preferred Stock, Shares Authorized	800,000	800,000	800,000
Preferred Stock, Shares Outstanding	0	0	0
Series B Preferred Stock [Member]
Preferred Stock, No Par Value	$ 0	$ 0	$ 0
Preferred Stock, Shares Authorized	220,000	220,000	220,000
Preferred Stock, Shares Outstanding	0	0	0