Fair Value Instruments Measured at Fair Value (Details Textual) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Fair Value Instruments Measured at Fair Value (Textual) [Abstract]
Transfers out consisted of charge-offs	$ 4.6
Recorded sales	0
Fair Value, Measurements, Nonrecurring [Member]
Fair Value Instruments Measured at Fair Value (Textual) [Abstract]
Loans classified as Level 3 transfers in	19.6
Other real estate owned and other reductions	12.4
Other real estate owned and other reductions classified as level 3 transfers out	16.8
Valuation write downs	2.1
Other real estate revenue	14.4
Other real estate owned and other reductions classified as level three transfers in	$ 3.5