Fair Value Disclosures (Details) (USD $)	3 Months Ended			12 Months Ended
	Mar. 31, 2013 Variable		Mar. 31, 2012	Dec. 31, 2012
Fair Value Disclosures [Abstract]
Value of collateral-dependent impaired loans that will be reviewed by independent third party, minimum	$ 250,000
Value of collateral-dependent impaired loans that will be reviewed by special assets group, maximum	250,000
Discount on appraisal value of retails properties (in hundredths)	5.00%
Impairment charges recognized [Abstract]
Capitalized mortgage loan servicing rights, carrying amount			8,500,000	8,800,000
Capitalized mortgage loan servicing rights, valuation allowance	5,300,000			6,100,000
Capitalized mortgage loan servicing rights recoveries	800,000		700,000
Collateral dependent loans, carrying amount	17,600,000			22,800,000
Collateral dependent loans, valuation allowance	5,400,000			6,500,000
Additional provision for loan losses on impaired loans	300,000		2,300,000
Other real estate, carrying amount	5,200,000			7,300,000
Other real estate, valuation allowance	4,800,000			6,000,000
Other real estate, additional charge	700,000		1,000,000
Total gains (losses) realized and unrealized [Abstract]
Steps in simulation model used to determine fair value of amended warrants	500-step lattice
Number of binomial lattice specified variables	14
Fair value option - Loans held for sale [Abstract]
Loans held for sale	37,554,000			47,487,000
Difference	1,149,000			1,843,000
Income Approach [Member] | Impaired Loans Commercial [Member]
Unobservable Inputs Weighted Average [Abstract]
Capitalization rate (in hundredths)	10.30%			10.80%
Income Approach [Member] | Other Real Estate Commercial [Member]
Unobservable Inputs Weighted Average [Abstract]
Capitalization rate (in hundredths)	11.00%			12.30%
Present Value of Net Servicing Revenue [Member]
Unobservable Inputs Weighted Average [Abstract]
Discount rate (in hundredths)	11.02%			11.00%
Cost to service	81			83
Ancillary income	43			43
Float rate (in hundredths)	0.96%			0.84%
Sales Comparison Approach [Member] | Impaired Loans Commercial [Member]
Unobservable Inputs Weighted Average [Abstract]
Adjustment for differences between comparable sales (in hundredths)	3.10%			16.70%
Sales Comparison Approach [Member] | Impaired Loans Mortgage [Member]
Unobservable Inputs Weighted Average [Abstract]
Adjustment for differences between comparable sales (in hundredths)	9.70%			9.50%
Sales Comparison Approach [Member] | Other Real Estate Commercial [Member]
Unobservable Inputs Weighted Average [Abstract]
Adjustment for differences between comparable sales (in hundredths)	(11.50%)			(12.40%)
Sales Comparison Approach [Member] | Other Real Estate Mortgage and Installment [Member]
Unobservable Inputs Weighted Average [Abstract]
Adjustment for differences between comparable sales (in hundredths)	31.60%			(6.30%)
Aggregate Fair Value [Member]
Fair value option - Loans held for sale [Abstract]
Loans held for sale	37,554,000			47,487,000
Contractual Principal [Member]
Fair value option - Loans held for sale [Abstract]
Loans held for sale	36,405,000			45,644,000
Amended Warrant [Member]
Liability [Roll Forward]
Beginning balance	(459,000)		(174,000)	(174,000)
Total gains (losses) realized and unrealized [Abstract]
Included in results of operations	(1,045,000)		(154,000)
Included in other comprehensive income	0		0
Purchases, issuances, settlements, maturities and calls	0		0
Transfers in and/or out of Level 3	0		0
Ending balance	(1,504,000)		(328,000)
Amount of total gains (losses) for the year included in earnings attributable to the change in unrealized gains (losses) relating to assets and liabilities still held at December 31	(1,045,000)		(154,000)
Quantitative information of fair value of liability under unobservable inputs [Abstract]
(Liability) Fair Value	(1,504,000)		(328,000)
Amended Warrant [Member] | Binomial Lattice Model [Member]
Quantitative information of fair value of liability under unobservable inputs [Abstract]
Percentage of probability of non-permitted equity raise (in hundredths)	0.50%			0.50%
Expected discount to stock price in an equity raise (in hundredths)	10.00%			10.00%
Dollar amount of expected capital raise	100,000,000			100,000,000
Expected time of non-permitted equity raise	Apr. 30, 2013			Apr. 30, 2013
Trading Securities [Member]
Changes in fair value for financial assets [Abstract]
Net Gains (Losses) on Assets, Securities	91,000		(8,000)
Net Gains (Losses) on Assets, Loans	0		0
Total Change in Fair Values Included in Current Period Earnings	91,000		(8,000)
Loans Held For Sale [Member]
Changes in fair value for financial assets [Abstract]
Net Gains (Losses) on Assets, Securities	0		0
Net Gains (Losses) on Assets, Loans	(694,000)		(421,000)
Total Change in Fair Values Included in Current Period Earnings	(694,000)		(421,000)
Fair Value Measurements [Member] | Fair Value, Measurements, Recurring [Member]
Assets [Abstract]
Trading securities	201,000			110,000
Securities available for sale [Abstract]
U.S. agency	8,106,000			30,667,000
US agency residential mortgage backed	194,007,000			127,412,000
Private label residential mortgage-backed	7,565,000			8,194,000
Obligations of states and political subdivisions	70,903,000			39,051,000
Trust preferred	2,365,000			3,089,000
Corporate	988,000
Loans held for sale	37,554,000			47,487,000
Derivatives	1,159,000	[1]		1,368,000	[1]
Liabilities [Abstract]
Derivatives	2,338,000	[2]		1,320,000	[2]
Fair Value Measurements [Member] | Fair Value, Measurements, Nonrecurring [Member]
ASSETS [Abstract]
Capitalized mortgage loan servicing rights	8,485,000	[3]		8,814,000	[3]
Installment [Abstract]
Loans held for sale relating to branch sale				3,292,000
Asset (Liability) Fair Value [Abstract]
Capitalized mortgage loan servicing rights	8,485,000	[3]		8,814,000	[3]
Fair Value Measurements [Member] | Fair Value, Measurements, Nonrecurring [Member] | Impaired Loans [Member]
Commercial [Abstract]
Income producing - real estate	3,185,000	[4]		3,727,000	[4]
Land, land development & construction - real estate	2,726,000	[4]		2,882,000	[4]
Commercial and industrial	3,375,000	[4]		6,581,000	[4]
Mortgage [Abstract]
1-4 Family	2,480,000	[4]		2,694,000	[4]
Resort Lending	438,000	[4]		380,000	[4]
Commercial [Abstract]
Income producing - real estate	3,185,000	[4]		3,727,000	[4]
Land, land development & construction - real estate	2,726,000	[4]		2,882,000	[4]
Mortgage [Abstract]
1-4 Family	2,480,000	[4]		2,694,000	[4]
Resort Lending	438,000	[4]		380,000	[4]
Fair Value Measurements [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate [Member]
Commercial [Abstract]
Income producing - real estate	86,000	[5]		86,000	[5]
Land, land development & construction - real estate	2,247,000	[5]		3,190,000	[5]
Mortgage [Abstract]
1-4 Family	631,000	[5]		405,000	[5]
Resort Lending	2,229,000	[5]		3,535,000	[5]
Commercial [Abstract]
Income producing - real estate	86,000	[5]		86,000	[5]
Land, land development & construction - real estate	2,247,000	[5]		3,190,000	[5]
Mortgage [Abstract]
1-4 Family	631,000	[5]		405,000	[5]
Resort Lending	2,229,000	[5]		3,535,000	[5]
Installment [Abstract]
Home equity installment - 1st lien	55,000	[5]		59,000	[5]
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets [Abstract]
Trading securities	201,000			110,000
Securities available for sale [Abstract]
Derivatives	0			0
Liabilities [Abstract]
Derivatives	0			0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member]
Assets [Abstract]
Trading securities	201,000			110,000
Securities available for sale [Abstract]
U.S. agency	0			0
US agency residential mortgage backed	0			0
Private label residential mortgage-backed	0			0
Obligations of states and political subdivisions	0			0
Trust preferred	0			0
Corporate	0
Loans held for sale	0			0
Derivatives	0	[1]		0	[1]
Liabilities [Abstract]
Derivatives	0	[2]		0	[2]
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Nonrecurring [Member]
ASSETS [Abstract]
Capitalized mortgage loan servicing rights	0	[3]		0	[3]
Installment [Abstract]
Loans held for sale relating to branch sale				0
Asset (Liability) Fair Value [Abstract]
Capitalized mortgage loan servicing rights	0	[3]		0	[3]
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Nonrecurring [Member] | Impaired Loans [Member]
Commercial [Abstract]
Income producing - real estate	0	[4]		0	[4]
Land, land development & construction - real estate	0	[4]		0	[4]
Commercial and industrial	0	[4]		0	[4]
Mortgage [Abstract]
1-4 Family	0	[4]		0	[4]
Resort Lending	0	[4]		0	[4]
Commercial [Abstract]
Income producing - real estate	0	[4]		0	[4]
Land, land development & construction - real estate	0	[4]		0	[4]
Mortgage [Abstract]
1-4 Family	0	[4]		0	[4]
Resort Lending	0	[4]		0	[4]
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate [Member]
Commercial [Abstract]
Income producing - real estate	0	[5]		0	[5]
Land, land development & construction - real estate	0	[5]		0	[5]
Mortgage [Abstract]
1-4 Family	0	[5]		0	[5]
Resort Lending	0	[5]		0	[5]
Commercial [Abstract]
Income producing - real estate	0	[5]		0	[5]
Land, land development & construction - real estate	0	[5]		0	[5]
Mortgage [Abstract]
1-4 Family	0	[5]		0	[5]
Resort Lending	0	[5]		0	[5]
Installment [Abstract]
Home equity installment - 1st lien	0	[5]		0	[5]
Significant Other Observable Inputs (Level 2) [Member]
Assets [Abstract]
Trading securities	0			0
Securities available for sale [Abstract]
Derivatives	1,159,000			1,368,000
Liabilities [Abstract]
Derivatives	834,000			861,000
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Assets [Abstract]
Trading securities	0			0
Securities available for sale [Abstract]
U.S. agency	8,106,000			30,667,000
US agency residential mortgage backed	194,007,000			127,412,000
Private label residential mortgage-backed	7,565,000			8,194,000
Obligations of states and political subdivisions	70,903,000			39,051,000
Trust preferred	2,365,000			3,089,000
Corporate	988,000
Loans held for sale	37,554,000			47,487,000
Derivatives	1,159,000	[1]		1,368,000	[1]
Liabilities [Abstract]
Derivatives	834,000	[2]		861,000	[2]
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Nonrecurring [Member]
ASSETS [Abstract]
Capitalized mortgage loan servicing rights	0	[3]		0	[3]
Installment [Abstract]
Loans held for sale relating to branch sale				3,292,000
Asset (Liability) Fair Value [Abstract]
Capitalized mortgage loan servicing rights	0	[3]		0	[3]
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Nonrecurring [Member] | Impaired Loans [Member]
Commercial [Abstract]
Income producing - real estate	0	[4]		0	[4]
Land, land development & construction - real estate	0	[4]		0	[4]
Commercial and industrial	0	[4]		0	[4]
Mortgage [Abstract]
1-4 Family	0	[4]		0	[4]
Resort Lending	0	[4]		0	[4]
Commercial [Abstract]
Income producing - real estate	0	[4]		0	[4]
Land, land development & construction - real estate	0	[4]		0	[4]
Mortgage [Abstract]
1-4 Family	0	[4]		0	[4]
Resort Lending	0	[4]		0	[4]
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate [Member]
Commercial [Abstract]
Income producing - real estate	0	[5]		0	[5]
Land, land development & construction - real estate	0	[5]		0	[5]
Mortgage [Abstract]
1-4 Family	0	[5]		0	[5]
Resort Lending	0	[5]		0	[5]
Commercial [Abstract]
Income producing - real estate	0	[5]		0	[5]
Land, land development & construction - real estate	0	[5]		0	[5]
Mortgage [Abstract]
1-4 Family	0	[5]		0	[5]
Resort Lending	0	[5]		0	[5]
Installment [Abstract]
Home equity installment - 1st lien	0	[5]		0	[5]
Significant Unobservable Inputs (Level 3) [Member]
Assets [Abstract]
Trading securities	0			0
Securities available for sale [Abstract]
Derivatives	0			0
Liabilities [Abstract]
Derivatives	1,504,000			459,000
ASSETS [Abstract]
Capitalized mortgage loan servicing rights	8,485,000			8,814,000
Asset (Liability) Fair Value [Abstract]
Capitalized mortgage loan servicing rights	8,485,000			8,814,000
Impaired loan [Abstract]
Commercial	9,286,000			13,190,000
Mortgage	2,918,000			3,074,000
Other real estate [Abstract]
Commercial	2,333,000			3,276,000
Mortgage and installment	2,915,000			3,999,000
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member]
Assets [Abstract]
Trading securities	0			0
Securities available for sale [Abstract]
U.S. agency	0			0
US agency residential mortgage backed	0			0
Private label residential mortgage-backed	0			0
Obligations of states and political subdivisions	0			0
Trust preferred	0			0
Corporate	0
Loans held for sale	0			0
Derivatives	0	[1]		0	[1]
Liabilities [Abstract]
Derivatives	1,504,000	[2]		459,000	[2]
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Nonrecurring [Member]
ASSETS [Abstract]
Capitalized mortgage loan servicing rights	8,485,000	[3]		8,814,000	[3]
Installment [Abstract]
Loans held for sale relating to branch sale				0
Asset (Liability) Fair Value [Abstract]
Capitalized mortgage loan servicing rights	8,485,000	[3]		8,814,000	[3]
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Nonrecurring [Member] | Impaired Loans [Member]
Commercial [Abstract]
Income producing - real estate	3,185,000	[4]		3,727,000	[4]
Land, land development & construction - real estate	2,726,000	[4]		2,882,000	[4]
Commercial and industrial	3,375,000	[4]		6,581,000	[4]
Mortgage [Abstract]
1-4 Family	2,480,000	[4]		2,694,000	[4]
Resort Lending	438,000	[4]		380,000	[4]
Commercial [Abstract]
Income producing - real estate	3,185,000	[4]		3,727,000	[4]
Land, land development & construction - real estate	2,726,000	[4]		2,882,000	[4]
Mortgage [Abstract]
1-4 Family	2,480,000	[4]		2,694,000	[4]
Resort Lending	438,000	[4]		380,000	[4]
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate [Member]
Commercial [Abstract]
Income producing - real estate	86,000	[5]		86,000	[5]
Land, land development & construction - real estate	2,247,000	[5]		3,190,000	[5]
Mortgage [Abstract]
1-4 Family	631,000	[5]		405,000	[5]
Resort Lending	2,229,000	[5]		3,535,000	[5]
Commercial [Abstract]
Income producing - real estate	86,000	[5]		86,000	[5]
Land, land development & construction - real estate	2,247,000	[5]		3,190,000	[5]
Mortgage [Abstract]
1-4 Family	631,000	[5]		405,000	[5]
Resort Lending	2,229,000	[5]		3,535,000	[5]
Installment [Abstract]
Home equity installment - 1st lien	$ 55,000	[5]		$ 59,000	[5]

[1] Included in accrued income and other assets

[2] Included in accrued expenses and other liabilities

[3] Only includes servicing rights that are carried at fair value due to recognition of a valuation allowance.

[4] Only includes impaired loans with specific loss allocations based on collateral value.

[5] Only includes other real estate with subsequent write downs to fair value.