Fair Value (Details Textual) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Total Impaired Loans	$ 1,258,000		$ 1,258,000		$ 10,900,000
Impaired Financing Receivable, Related Allowance	719,000		719,000		7,200,000
Impaired Financing Receivables, Provisional Expenses	1,200,000	717,000	5,400,000	6,200,000
Mortgage servicing rights	7,752,000		7,752,000		8,700,000
Valuation Allowance Of Mortgage Servicing Rights	2,400,000		2,400,000		1,500,000
Amortization of mortgage servicing rights	(892,000)	(553,000)	(2,610,000)	(1,349,000)
Real Estate Held For Sale, Increase Decrease In Fair Value	36,000	93,000	299,000	644,000
Mortgage Services Rights [Member]
Amortization of mortgage servicing rights	$ 600,000	$ 1,100,000	$ 855,000	$ 585,000