Fair Value - Level 3 Instruments (Details) (USD $)				3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended				3 Months Ended		6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011		Jun. 30, 2012 Interest Rate Swap Agreements Derivative Financial Instruments, Assets	Jun. 30, 2011 Interest Rate Swap Agreements Derivative Financial Instruments, Assets	Jun. 30, 2012 Interest Rate Swap Agreements Derivative Financial Instruments, Assets	Jun. 30, 2011 Interest Rate Swap Agreements Derivative Financial Instruments, Assets	Jun. 30, 2012 Interest Rate Swap Agreements Derivative Financial Instruments, Liabilities	Jun. 30, 2011 Interest Rate Swap Agreements Derivative Financial Instruments, Liabilities	Jun. 30, 2012 Interest Rate Swap Agreements Derivative Financial Instruments, Liabilities	Jun. 30, 2011 Interest Rate Swap Agreements Derivative Financial Instruments, Liabilities	Jun. 30, 2012 Interest Rate Lock Commitments Derivative Financial Instruments, Assets	Jun. 30, 2011 Interest Rate Lock Commitments Derivative Financial Instruments, Assets	Jun. 30, 2012 Interest Rate Lock Commitments Derivative Financial Instruments, Assets	Jun. 30, 2011 Interest Rate Lock Commitments Derivative Financial Instruments, Assets	Jun. 30, 2012 Forward Sales Commitments Derivative Financial Instruments, Assets	Dec. 31, 2011 Forward Sales Commitments Derivative Financial Instruments, Assets	Jun. 30, 2012 Mortgage Servicing Rights Derivative Financial Instruments, Assets	Jun. 30, 2011 Mortgage Servicing Rights Derivative Financial Instruments, Assets	Jun. 30, 2012 Mortgage Servicing Rights Derivative Financial Instruments, Assets	Jun. 30, 2011 Mortgage Servicing Rights Derivative Financial Instruments, Assets
Rollforward of Level 3 Assets [Rollforward]
Beginning balance				$ 209,000	$ 133,000	$ 217,000	$ 159,000					$ (159,000)	$ 337,000	$ 129,818	$ 105,000	$ 101,972	$ 57,363	$ 2,151,000	$ 2,220,000	$ 1,871,000	$ 2,144,000
Purchases, sales, issuances and settlements				0	0	0	0
Capitalized																		177,000	60,000	344,000	195,000
Gains/losses included in other income				4,000	40,000	(4,000)	14,000					737,000	(321,000)	448,000	(89,000)			(439,000)	(87,000)	(326,000)	(146,000)
Transfer in and out												0	0	0	0
Ending balance				213,000	173,000	213,000	173,000					577,823	16,000	577,823	16,000	101,972	57,363	1,889,000	2,193,000	1,889,000	2,193,000
Rollforward of Level 3 Liabilities [Rollforward]
Beginning balance								209,000	133,000	217,000	159,000
Purchases, sales, issuances and settlements								0	0	0	0
Gains/lossses included in other income								4,000	40,000	(4,000)	14,000
Ending balance								213,000	173,000	213,000	173,000
Other real estate owned	$ 25,573,000	$ 24,966,000	[1]

[1] Derived from audited consolidated financial statements