Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

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+ Details

Fair Value Measurements (Details Textual) (USD $)	9 Months Ended		12 Months Ended
Fair Value Measurements (Details Textual) (USD $)	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Fair Value Measurements (Textual) [Abstract]
Impairment of goodwill	$ 0	$ 0	$ 0
Core deposit intangible assets [Member]
Fair Value Measurements (Textual) [Abstract]
Impairment identified for intangible assets	0	0	0
Maximum [Member]
Fair Value Measurements (Textual) [Abstract]
Expected life of intangible assets	15 years
Percentage of discount factors used to determine fair value	80.00%
Minimum [Member]
Fair Value Measurements (Textual) [Abstract]
Expected life of intangible assets	10 years
Percentage of discount factors used to determine fair value	70.00%
Other Real Estate and Repossessed Assets [Member] \| Maximum [Member]
Fair Value Measurements (Textual) [Abstract]
Percentage of discount factors used to determine fair value	75.00%
Other Real Estate and Repossessed Assets [Member] \| Minimum [Member]
Fair Value Measurements (Textual) [Abstract]
Percentage of discount factors used to determine fair value	70.00%
Fair Value Measurements Recurring [Member]
Fair Value Measurements (Textual) [Abstract]
Liabilities recorded at fair value	0	0	0
Fair Value Measurements Nonrecurring [Member]
Fair Value Measurements (Textual) [Abstract]
Liabilities recorded at fair value	$ 0	$ 0	$ 0