Fair Value - Level 3 Instruments (Details) (USD $)				3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011		Sep. 30, 2012 Interest Rate Swap Agreements Derivative Financial Instruments, Assets	Sep. 29, 2011 Interest Rate Swap Agreements Derivative Financial Instruments, Assets	Sep. 30, 2012 Interest Rate Swap Agreements Derivative Financial Instruments, Assets	Sep. 30, 2011 Interest Rate Swap Agreements Derivative Financial Instruments, Assets	Sep. 30, 2012 Interest Rate Swap Agreements Derivative Financial Instruments, Liabilities	Sep. 29, 2011 Interest Rate Swap Agreements Derivative Financial Instruments, Liabilities	Sep. 30, 2012 Interest Rate Swap Agreements Derivative Financial Instruments, Liabilities	Sep. 30, 2011 Interest Rate Swap Agreements Derivative Financial Instruments, Liabilities	Sep. 30, 2012 Interest Rate Lock Commitments Derivative Financial Instruments, Assets	Sep. 29, 2011 Interest Rate Lock Commitments Derivative Financial Instruments, Assets	Sep. 30, 2012 Interest Rate Lock Commitments Derivative Financial Instruments, Assets	Sep. 30, 2011 Interest Rate Lock Commitments Derivative Financial Instruments, Assets	Sep. 30, 2012 Forward Sales Commitments Derivative Financial Instruments, Assets	Dec. 31, 2011 Forward Sales Commitments Derivative Financial Instruments, Assets	Sep. 30, 2012 Mortgage Servicing Rights Derivative Financial Instruments, Assets	Sep. 29, 2011 Mortgage Servicing Rights Derivative Financial Instruments, Assets	Sep. 30, 2012 Mortgage Servicing Rights Derivative Financial Instruments, Assets	Sep. 30, 2011 Mortgage Servicing Rights Derivative Financial Instruments, Assets
Rollforward of Level 3 Assets [Rollforward]
Beginning balance				$ 213,000	$ 173,000	$ 217,000	$ 159,000					$ 578,000	$ 16,000	$ 129,818	$ 105,000	$ 1,008,706	$ 57,363	$ 1,889,000	$ 2,193,000	$ 1,871,000	$ 2,144,000
Purchases, sales, issuances and settlements				0	0	0	0
Capitalized																		300,000	71,000	645,000	266,000
Gains/losses included in other income				0	55,000	(4,000)	69,000					(1,069,000)	314,000	(621,000)	225,000			(153,000)	(248,000)	(480,000)	(394,000)
Transfer in and out												0	0	0	0
Ending balance				213,000		213,000	228,000					(491,245)		(491,245)	330,000	1,008,706	57,363	2,036,000		2,036,000	2,016,000
Rollforward of Level 3 Liabilities [Rollforward]
Beginning balance								213,000	173,000	217,000	159,000
Purchases, sales, issuances and settlements								0	0	0	0
Gains/lossses included in other income								0	55,000	(4,000)	69,000
Ending balance								213,000		213,000	228,000
Other real estate owned	$ 22,294,000	$ 24,966,000	[1]

[1] Derived from audited consolidated financial statements