Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	$ 8,068
Charge-offs	(2,953)
Recoveries	100
Provision for loan losses	3,134
Ending Balance	8,349		8,068
Allowance for Loan Losses [Abstract]
Individually evaluated for impairment	554
Collectively evaluated for impairment	7,795
Total	8,349		8,068
Loans [Abstract]
Individually evaluated for impairment	18,456
Collectively evaluated for impairment	574,659
Total	593,115
Ratios for allowance for loan losses [Abstract]
Ratio of allowance for loan losses to the end of period loans, net of unearned income and deferred fees (in hundredths)	1.41%		1.37%		1.33%
Ratio of net charge-offs to average loans, net of unearned income and deferred fees (in hundredths)	0.49%		0.43%		0.46%
Nonperforming assets [Abstract]
Nonaccrual loans	10,870		1,398		1,938
Restructured loans in nonaccrual	2,151		3,806		6,133
Total nonperforming loans	13,021		5,204		8,071
Other real estate owned, net	1,435		1,489		1,723
Total nonperforming assets	14,456		6,693		9,794
Ratio of nonperforming assets to loans, net of unearned income and deferred fees, plus other real estate owned (in hundredths)	2.44%		1.13%		1.69%
Ratio of allowance for loan losses to nonperforming loans (in hundredths)	64.12%	[1]	155.03%	[1]	94.96%	[1]
Number of days loans past due, minimum	90 days
Summary of loans past due 90 days or more and impaired loans [Abstract]
Loans past due 90 days or more and still accruing	170		481		1,336
Ratio of loans past due 90 days or more and still accruing to loans, net of unearned income and deferred fees (in hundredths)	0.03%		0.08%		0.23%
Accruing restructured loans	2,005		3,756		350
Impaired loans:
Impaired loans with no valuation allowance	16,974		5,505		1,115
Impaired loans with a valuation allowance	1,482		7,091		7,676
Total impaired loans	18,456		12,596		8,791
Valuation allowance	(554)		(1,123)		(1,200)
Impaired loans, net of allowance	17,902		11,473		7,591
Average recorded investment in impaired loans	13,540	[2]	8,734		7,526
Income recognized on impaired loans, after designation as impaired	9		141		17
Amount of income recognized on a cash basis	0		0		0
Scenario, Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	8,068	[3]	7,664	[3]	6,926	[3]
Charge-offs			(2,628)	[3]	(2,810)	[3]
Recoveries			83	[3]	139	[3]
Provision for loan losses	3,134		2,949	[3]	3,409	[3]
Ending Balance	8,349		8,068	[3]	7,664	[3]
Allowance for Loan Losses [Abstract]
Individually evaluated for impairment	269		1,123	[3]
Collectively evaluated for impairment	8,080		6,945	[3]
Total	8,349		8,068	[3]	7,664	[3]
Loans [Abstract]
Individually evaluated for impairment	11,053		12,596	[3]
Collectively evaluated for impairment	582,062		575,874	[3]
Total			588,470	[3]
Nonperforming assets [Abstract]
Nonaccrual loans	3,466
Restructured loans in nonaccrual	2,151
Total nonperforming loans	5,617		5,204	[4]
Other real estate owned, net	1,435
Total nonperforming assets	7,052
Ratio of nonperforming assets to loans, net of unearned income and deferred fees, plus other real estate owned (in hundredths)	1.19%
Ratio of allowance for loan losses to nonperforming loans (in hundredths)	148.64%
Summary of loans past due 90 days or more and impaired loans [Abstract]
Loans past due 90 days or more and still accruing	170		481	[4]
Impaired loans:
Impaired loans with no valuation allowance	10,422
Impaired loans with a valuation allowance	631
Total impaired loans	11,053		12,596	[4]	8,791	[4]
Valuation allowance	(269)		(1,123)	[4]	(1,200)	[4]
Impaired loans, net of allowance	10,784
Average recorded investment in impaired loans	13,520	[1]	8,734	[2],[4]	7,526	[2],[4]
Income recognized on impaired loans, after designation as impaired			141	[4]	17	[4]
Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	1,079
Charge-offs	(640)
Recoveries	13
Provision for loan losses	618
Ending Balance	1,070
Allowance for Loan Losses [Abstract]
Individually evaluated for impairment	0
Collectively evaluated for impairment	1,070
Total	1,070
Loans [Abstract]
Individually evaluated for impairment	6,643
Collectively evaluated for impairment	43,670
Total	50,313
Real Estate Construction [Member] | Scenario, Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Provision for loan losses	723
Ending Balance	1,175
Allowance for Loan Losses [Abstract]
Individually evaluated for impairment	0
Collectively evaluated for impairment	1,175
Total	1,175
Loans [Abstract]
Individually evaluated for impairment	3,623
Collectively evaluated for impairment	46,690
Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	1,245
Charge-offs	(370)
Recoveries	8
Provision for loan losses	1,380
Ending Balance	2,263
Allowance for Loan Losses [Abstract]
Individually evaluated for impairment	43
Collectively evaluated for impairment	2,220
Total	2,263
Loans [Abstract]
Individually evaluated for impairment	864
Collectively evaluated for impairment	142,398
Total	143,262
Consumer Real Estate [Member] | Scenario, Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	1,052	[3]	1,059	[3]	249	[3]
Charge-offs			(461)	[3]	(89)	[3]
Recoveries			14	[3]	10	[3]
Provision for loan losses	1,380		440	[3]	889	[3]
Ending Balance	2,263		1,052	[3]	1,059	[3]
Allowance for Loan Losses [Abstract]
Individually evaluated for impairment	43		0	[3]
Collectively evaluated for impairment	2,220		1,052	[3]
Total	2,263		1,052	[3]	1,059	[3]
Loans [Abstract]
Individually evaluated for impairment	864		238	[3]
Collectively evaluated for impairment	142,398		109,843	[3]
Total			110,081	[3]
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	3,515
Charge-offs	(1,589)
Recoveries	0
Provision for loan losses	1,516
Ending Balance	3,442
Allowance for Loan Losses [Abstract]
Individually evaluated for impairment	273
Collectively evaluated for impairment	3,169
Total	3,442
Loans [Abstract]
Individually evaluated for impairment	10,329
Collectively evaluated for impairment	293,979
Total	304,308
Commercial Real Estate [Member] | Scenario, Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	4,511	[3]	4,033	[3]	4,321	[3]
Charge-offs			(457)	[3]	(1,021)	[3]
Recoveries			0	[3]	61	[3]
Provision for loan losses	1,389		935	[3]	672	[3]
Ending Balance	3,315		4,511	[3]	4,033	[3]
Allowance for Loan Losses [Abstract]
Individually evaluated for impairment	0		1,014	[3]
Collectively evaluated for impairment	3,315		3,497	[3]
Total	3,315		4,511	[3]	4,033	[3]
Loans [Abstract]
Individually evaluated for impairment	6,048		9,067	[3]
Collectively evaluated for impairment	298,260		357,507	[3]
Total			366,574	[3]
Consumer Non Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	403
Charge-offs	(245)
Recoveries	77
Provision for loan losses	189
Ending Balance	424
Allowance for Loan Losses [Abstract]
Individually evaluated for impairment	7
Collectively evaluated for impairment	417
Total	424
Loans [Abstract]
Individually evaluated for impairment	46
Collectively evaluated for impairment	31,668
Total	31,714
Consumer Non Real Estate [Member] | Scenario, Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	401	[3]	586	[3]	1,049	[3]
Charge-offs			(266)	[3]	(358)	[3]
Recoveries			68	[3]	67	[3]
Provision for loan losses	182		13	[3]	(172)	[3]
Ending Balance	417		401	[3]	586	[3]
Allowance for Loan Losses [Abstract]
Individually evaluated for impairment	0		0	[3]
Collectively evaluated for impairment	417		401	[3]
Total	417		401	[3]	586	[3]
Loans [Abstract]
Individually evaluated for impairment	0		0	[3]
Collectively evaluated for impairment	31,714		29,707	[3]
Total			29,707	[3]
Commercial Non Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	1,473
Charge-offs	(109)
Recoveries	2
Provision for loan losses	(407)
Ending Balance	959
Allowance for Loan Losses [Abstract]
Individually evaluated for impairment	231
Collectively evaluated for impairment	728
Total	959
Loans [Abstract]
Individually evaluated for impairment	574
Collectively evaluated for impairment	36,775
Total	37,349
Commercial Non Real Estate [Member] | Scenario, Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Provision for loan losses	(410)
Ending Balance	956
Allowance for Loan Losses [Abstract]
Individually evaluated for impairment	226
Collectively evaluated for impairment	730
Total	956
Loans [Abstract]
Individually evaluated for impairment	518
Collectively evaluated for impairment	36,831
Commercial and Industrial [Member] | Scenario, Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance			1,108	[3]	459	[3]
Charge-offs			(655)	[3]	(927)	[3]
Recoveries			1	[3]	1	[3]
Provision for loan losses			581	[3]	1,575	[3]
Ending Balance			1,035	[3]	1,108	[3]
Allowance for Loan Losses [Abstract]
Individually evaluated for impairment			62	[3]
Collectively evaluated for impairment			973	[3]
Total			1,035	[3]	1,108	[3]
Loans [Abstract]
Individually evaluated for impairment			139	[3]
Collectively evaluated for impairment			37,584	[3]
Total			37,723	[3]
Public Sector and IDA [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	232
Charge-offs	0
Recoveries	0
Provision for loan losses	(90)
Ending Balance	142
Allowance for Loan Losses [Abstract]
Individually evaluated for impairment	0
Collectively evaluated for impairment	142
Total	142
Loans [Abstract]
Individually evaluated for impairment	0
Collectively evaluated for impairment	26,169
Total	26,169
Nonperforming assets [Abstract]
Total nonperforming loans	0
Summary of loans past due 90 days or more and impaired loans [Abstract]
Loans past due 90 days or more and still accruing	0
Impaired loans:
Total impaired loans	0
Valuation allowance	0
Average recorded investment in impaired loans	0	[2]
Income recognized on impaired loans, after designation as impaired	0
Public Sector and IDA [Member] | Scenario, Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Provision for loan losses	(90)
Ending Balance	142
Allowance for Loan Losses [Abstract]
Individually evaluated for impairment	0
Collectively evaluated for impairment	142
Total	142
Loans [Abstract]
Individually evaluated for impairment	0
Collectively evaluated for impairment	26,169
Construction, Development & Other Land [Member] | Scenario, Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance			749	[3]	562	[3]
Charge-offs			(789)	[3]	(415)	[3]
Recoveries			0	[3]	0	[3]
Provision for loan losses			988	[3]	602	[3]
Ending Balance			948	[3]	749	[3]
Allowance for Loan Losses [Abstract]
Individually evaluated for impairment			47	[3]
Collectively evaluated for impairment			901	[3]
Total			948	[3]	749	[3]
Loans [Abstract]
Individually evaluated for impairment			3,152	[3]
Collectively evaluated for impairment			41,233	[3]
Total			44,385	[3]
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	121
Charge-offs	0
Recoveries	0
Provision for loan losses	(72)
Ending Balance	49
Allowance for Loan Losses [Abstract]
Individually evaluated for impairment	0
Collectively evaluated for impairment	49
Total	49
Loans [Abstract]
Individually evaluated for impairment	0
Collectively evaluated for impairment	0
Total	0
Unallocated [Member] | Scenario, Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	121	[3]	129	[3]	286	[3]
Charge-offs			0	[3]	0	[3]
Recoveries			0	[3]	0	[3]
Provision for loan losses	(40)		(8)	[3]	(157)	[3]
Ending Balance	81		121	[3]	129	[3]
Allowance for Loan Losses [Abstract]
Individually evaluated for impairment	0		0	[3]
Collectively evaluated for impairment	81		121	[3]
Total	81		121	[3]	129	[3]
Loans [Abstract]
Individually evaluated for impairment	0		0	[3]
Collectively evaluated for impairment	0		0	[3]
Total			$ 0	[3]

[1] The Company defines nonperforming loans as total nonaccrual and restructured loans that are nonaccrual. Loans 90 days past due and still accruing and accruing restructured loans are excluded.

[2] Recorded investment includes the unpaid principal balance and any accrued interest and deferred fees and costs.

[3] Segments reported for December 31, 2011 and December 31, 2010 are presented using the segmentation method in effect for 2011 and 2010. The Company began reporting under revised segments beginning 2012.

[4] Segments and classes at December 31, 2011 are reported using the segmentation method in effect for 2011. The Company began reporting under revised segments beginning in 2012.