Fair Value - Level 3 Instruments (Details) (USD $)				3 Months Ended								3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012		Mar. 31, 2013 Interest Rate Swap Agreements Derivative Financial Instruments, Assets	Mar. 31, 2012 Interest Rate Swap Agreements Derivative Financial Instruments, Assets	Mar. 31, 2013 Interest Rate Swap Agreements Derivative Financial Instruments, Liabilities	Mar. 31, 2012 Interest Rate Swap Agreements Derivative Financial Instruments, Liabilities	Mar. 31, 2013 Interest Rate Lock Commitments Derivative Financial Instruments, Assets	Mar. 31, 2012 Interest Rate Lock Commitments Derivative Financial Instruments, Assets	Mar. 31, 2013 Forward Sales Commitments Derivative Financial Instruments, Assets	Dec. 31, 2012 Forward Sales Commitments Derivative Financial Instruments, Assets	Mar. 31, 2013 Mortgage Servicing Rights Derivative Financial Instruments, Assets	Mar. 31, 2012 Mortgage Servicing Rights Derivative Financial Instruments, Assets
Rollforward of Level 3 Assets [Rollforward]
Beginning balance				$ 196,000	$ 216,000			$ 873,000	$ 130,000	$ (425,220)	$ (480,806)	$ 2,525,000	$ 1,871,000
Purchases, sales, issuances and settlements				0	0
Capitalized												418,000	167,000
Gains/losses included in other income				(16,000)	(7,000)			(66,000)	(289,000)			102,000	113,000
Transfer in and out								0	0
Ending balance				180,000	209,000			807,000	(159,000)	(425,220)	(480,806)	3,045,000	2,151,000
Rollforward of Level 3 Liabilities [Rollforward]
Beginning balance						196,000	216,000
Purchases, sales, issuances and settlements						0	0
Gains/lossses included in other income						(16,000)	(7,000)
Ending balance						180,000	209,000
Other real estate owned	$ 5,449,000	$ 8,738,000	[1]

[1] Derived from audited consolidated financial statements