Loans (Details 5) (USD $)	3 Months Ended
Mar. 31, 2015 class component	Mar. 31, 2014	Dec. 31, 2014
Loans and Leases Receivable Disclosure [Abstract]
The total number of components that represents the allowance for loan losses	2
The number of classes that groups of loans are collectively evaluated for impairment	2
Period considered for quarter moving average which is a factor to calculate historical charge-off	36 months
Changes in allowance
Beginning Balance	$ 10,579,000	$ 10,144,000
Charge-offs	(526,000)	(2,134,000)
Recoveries	73,000	25,000
Provision for loan losses	700,000us-gaap_ProvisionForLoanAndLeaseLosses	485,000us-gaap_ProvisionForLoanAndLeaseLosses
Ending Balance	10,826,000	8,520,000
Allowance for Loan Losses:
Individually evaluated for impairment	1,992,000		2,093,000
Collectively evaluated for impairment	8,834,000		8,486,000
Total ending allowance balance	10,826,000	8,520,000
Loans:
Individually evaluated for impairment	18,295,000		17,227,000
Collectively evaluated for impairment	926,450,000		899,193,000
Total	945,092,000		916,769,000
Receivables Acquired with Deteriorated Credit Quality
Activity in the allowance
Allowance for loan losses	0
Loans:
Loans acquired with deteriorated credit quality	347,000		349,000
Commercial, Financial and Agricultural
Changes in allowance
Beginning Balance	1,124,000	474,000
Charge-offs	(20,000)	0
Recoveries	26,000	3,000
Provision for loan losses	348,000	60,000
Ending Balance	1,478,000	537,000
Allowance for Loan Losses:
Individually evaluated for impairment	264,000		298,000
Collectively evaluated for impairment	1,214,000		826,000
Total ending allowance balance	1,478,000	537,000
Loans:
Individually evaluated for impairment	1,186,000		1,112,000
Collectively evaluated for impairment	131,397,000		123,044,000
Total	132,583,000		124,156,000
Commercial, Financial and Agricultural \| Receivables Acquired with Deteriorated Credit Quality
Loans:
Loans acquired with deteriorated credit quality	0		0
Residential
Changes in allowance
Beginning Balance	3,755,000	3,917,000
Charge-offs	(1,000)	(56,000)
Recoveries	24,000	2,000
Provision for loan losses	449,000	(801,000)
Ending Balance	4,227,000	3,062,000
Allowance for Loan Losses:
Individually evaluated for impairment	211,000		147,000
Collectively evaluated for impairment	4,016,000		3,608,000
Total ending allowance balance	4,227,000	3,062,000
Loans:
Individually evaluated for impairment	1,561,000		1,117,000
Collectively evaluated for impairment	472,295,000		456,294,000
Total	474,203,000		457,760,000
Residential \| Receivables Acquired with Deteriorated Credit Quality
Loans:
Loans acquired with deteriorated credit quality	347,000		349,000
Residential \| Financing receivable \| Owners of rental properties
Changes in allowance
Concentration of loans (as a percent)	16.20%	15.87%
Commercial
Changes in allowance
Beginning Balance	4,205,000	4,079,000
Charge-offs	(449,000)	(2,038,000)
Recoveries	0	0
Provision for loan losses	117,000	1,283,000
Ending Balance	3,873,000	3,324,000
Allowance for Loan Losses:
Individually evaluated for impairment	1,451,000		1,581,000
Collectively evaluated for impairment	2,422,000		2,624,000
Total ending allowance balance	3,873,000	3,324,000
Loans:
Individually evaluated for impairment	14,631,000		13,973,000
Collectively evaluated for impairment	277,906,000		277,375,000
Total	292,537,000		291,348,000
Commercial \| Receivables Acquired with Deteriorated Credit Quality
Loans:
Loans acquired with deteriorated credit quality	0		0
Commercial \| Financing receivable \| Owners of rental properties
Changes in allowance
Concentration of loans (as a percent)	14.46%	13.18%
Construction
Changes in allowance
Beginning Balance	786,000	741,000
Charge-offs	0	0
Recoveries	11,000	0
Provision for loan losses	(45,000)	54,000
Ending Balance	752,000	795,000
Allowance for Loan Losses:
Individually evaluated for impairment	66,000		67,000
Collectively evaluated for impairment	686,000		719,000
Total ending allowance balance	752,000	795,000
Loans:
Individually evaluated for impairment	917,000		1,025,000
Collectively evaluated for impairment	21,579,000		20,971,000
Total	22,496,000		21,996,000
Construction \| Receivables Acquired with Deteriorated Credit Quality
Loans:
Loans acquired with deteriorated credit quality	0		0
Installment Loans to Individuals
Changes in allowance
Beginning Balance	245,000	139,000
Charge-offs	(56,000)	(40,000)
Recoveries	12,000	20,000
Provision for loan losses	(8,000)	42,000
Ending Balance	193,000	161,000
Allowance for Loan Losses:
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	193,000		245,000
Total ending allowance balance	193,000	161,000
Loans:
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	23,273,000		21,509,000
Total	23,273,000		21,509,000
Installment Loans to Individuals \| Receivables Acquired with Deteriorated Credit Quality
Loans:
Loans acquired with deteriorated credit quality	0		0
Unallocated
Changes in allowance
Beginning Balance	464,000	794,000
Charge-offs	0	0
Recoveries	0	0
Provision for loan losses	(161,000)	(153,000)
Ending Balance	303,000	641,000
Allowance for Loan Losses:
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	303,000		464,000
Total ending allowance balance	303,000	641,000
Purchased loans \| Receivables Acquired with Deteriorated Credit Quality
Loans:
Loans acquired with deteriorated credit quality	$ 447,000

The number of classes that groups of loans are collectively evaluated for impairment.

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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A valuation allowance for financing receivables that are expected to be uncollectible.

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The balance of financing receivables that were collectively evaluated for impairment.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services.

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Amount of expense related to estimated loss from loan and lease transactions.

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