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Intangible Assets (Details Textual) (USD $)	12 Months Ended			0 Months Ended
Intangible Assets (Details Textual) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 29, 2010 Fannie Mae [Member] CommunityOne [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of core deposit premiums	$ 1,407,000	$ 896,000	$ 795,000
Unpaid principal balance of mortgage loans serviced for others (unconsolidated)	65,100,000	2,000,000	493,700,000
Servicing Assets, Unconsolidated Mortgage Loans Serviced, Unpaid Principal Balance		700,000
Sale of Mortgage Servicing Rights (MSR)				492,900,000
Loss on sale of Mortgage Servicing Rights (MSR)				$ 3,000,000

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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