FDIC Loss Sharing Assets and Other Assets (Details Textual) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
FDIC Loss Sharing Assets and Other Assets (Textual) [Abstract]
Claims Submitted for Losses on covered loans	$ 101.0
Prepaid FDIC insurance assessments	$ 12.2	$ 17.5