Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended				12 Months Ended		3 Months Ended	6 Months Ended	12 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended		6 Months Ended				3 Months Ended	6 Months Ended	3 Months Ended		6 Months Ended				3 Months Ended	6 Months Ended	3 Months Ended		6 Months Ended				3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended				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		Jun. 30, 2012		Jun. 30, 2011		Dec. 31, 2011		Jun. 30, 2011 Scenario, Previously Reported [Member]	Jun. 30, 2011 Scenario, Previously Reported [Member]	Dec. 31, 2011 Scenario, Previously Reported [Member]		Jun. 30, 2012 Real Estate Construction [Member]	Jun. 30, 2012 Real Estate Construction [Member]	Jun. 30, 2012 Consumer Real Estate [Member]	Jun. 30, 2012 Consumer Real Estate [Member]	Jun. 30, 2011 Consumer Real Estate [Member] Scenario, Previously Reported [Member]		Jun. 30, 2011 Consumer Real Estate [Member] Scenario, Previously Reported [Member]		Dec. 31, 2011 Consumer Real Estate [Member] Scenario, Previously Reported [Member]		Jun. 30, 2012 Commercial Real Estate [Member]	Jun. 30, 2012 Commercial Real Estate [Member]	Jun. 30, 2011 Commercial Real Estate [Member] Scenario, Previously Reported [Member]		Jun. 30, 2011 Commercial Real Estate [Member] Scenario, Previously Reported [Member]		Dec. 31, 2011 Commercial Real Estate [Member] Scenario, Previously Reported [Member]		Jun. 30, 2012 Commercial Non Real Estate [Member]	Jun. 30, 2012 Commercial Non Real Estate [Member]	Jun. 30, 2011 Commercial and Industrial [Member] Scenario, Previously Reported [Member]		Jun. 30, 2011 Commercial and Industrial [Member] Scenario, Previously Reported [Member]		Dec. 31, 2011 Commercial and Industrial [Member] Scenario, Previously Reported [Member]		Jun. 30, 2012 Public Sector and IDA [Member]		Jun. 30, 2012 Public Sector and IDA [Member]		Jun. 30, 2011 Construction, Development & Other Land [Member] Scenario, Previously Reported [Member]		Jun. 30, 2011 Construction, Development & Other Land [Member] Scenario, Previously Reported [Member]		Dec. 31, 2011 Construction, Development & Other Land [Member] Scenario, Previously Reported [Member]		Jun. 30, 2012 Consumer Non Real Estate [Member]	Jun. 30, 2012 Consumer Non Real Estate [Member]	Jun. 30, 2011 Consumer Non Real Estate [Member] Scenario, Previously Reported [Member]		Jun. 30, 2011 Consumer Non Real Estate [Member] Scenario, Previously Reported [Member]		Dec. 31, 2011 Consumer Non Real Estate [Member] Scenario, Previously Reported [Member]		Jun. 30, 2012 Unallocated [Member]	Jun. 30, 2012 Unallocated [Member]	Jun. 30, 2011 Unallocated [Member] Scenario, Previously Reported [Member]	Jun. 30, 2011 Unallocated [Member] Scenario, Previously Reported [Member]	Dec. 31, 2011 Unallocated [Member] Scenario, Previously Reported [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	$ 8,063		$ 8,068						$ 8,245	$ 7,664	$ 7,664		$ 674	$ 1,079	$ 2,252	$ 1,245	$ 1,102	[1]	$ 1,059	[1]	$ 1,052	[2]	$ 3,220	$ 3,515	$ 4,655	[1]	$ 4,033	[1]	$ 4,511	[2]	$ 1,126	$ 1,473	$ 1,221	[1]	$ 1,108	[1]	$ 1,035	[2]	$ 85		$ 232		$ 690	[1]	$ 749	[1]	$ 948	[2]	$ 482	$ 403	$ 464	[1]	$ 586	[1]	$ 401	[2]	$ 224	$ 121	$ 113	$ 129	$ 121
Charge-offs	(1,028)		(1,728)						(515)	(759)			(589)	(589)	(150)	(245)	(176)	[1]	(212)	[1]			(200)	(737)	(142)	[1]	(260)	[1]			(5)	(5)	(137)	[1]	(137)	[1]			0		0		0	[1]	0	[1]			(84)	(152)	(60)	[1]	(150)	[1]			0	0	0	0
Recoveries	29		52						11	36			13	13	2	2	0	[1]	7	[1]			0	0	0	[1]	0	[1]			1	1	1	[1]	1	[1]			0		0		0	[1]	0	[1]			13	36	10	[1]	28	[1]			0	0	0	0
Provision for loan losses	1,104		1,776						753	1,553			1,298	893	(194)	908	445	[1]	517	[1]			237	479	(180)	[1]	560	[1]			(213)	(560)	263	[1]	376	[1]			26		(121)		(54)	[1]	(113)	[1]			11	135	69	[1]	19	[1]			(61)	42	210	194
Ending Balance	8,168		8,168				8,068		8,494	8,494	8,068		1,396	1,396	1,910	1,910	1,371	[1]	1,371	[1]	1,052	[2]	3,257	3,257	4,333	[1]	4,333	[1]	4,511	[2]	909	909	1,348	[1]	1,348	[1]	1,035	[2]	111		111		636	[1]	636	[1]	948	[2]	422	422	483	[1]	483	[1]	401	[2]	163	163	323	323	121
Allowance for Loan Losses [Abstract]
Individually evaluated for impairment	362		362								1,123		0	0	54	54					0	[2]	56	56					1,014	[2]	243	243					62	[2]	0		0						47	[2]	9	9					0	[2]	0	0			0
Collectively evaluated for impairment	7,806		7,806								6,945		1,396	1,396	1,856	1,856					1,052	[2]	3,201	3,201					3,497	[2]	666	666					973	[2]	111		111						901	[2]	413	413					401	[2]	163	163			121
Total	8,168		8,168				8,068		8,494	8,494	8,068		1,396	1,396	1,910	1,910	1,371	[1]	1,371	[1]	1,052	[2]	3,257	3,257	4,333	[1]	4,333	[1]	4,511	[2]	909	909	1,348	[1]	1,348	[1]	1,035	[2]	111		111		636	[1]	636	[1]	948	[2]	422	422	483	[1]	483	[1]	401	[2]	163	163	323	323	121
Loans [Abstract]
Individually evaluated for impairment	13,917		13,917								12,596		4,711	4,711	1,358	1,358					238	[2]	7,251	7,251					9,067	[2]	546	546					139	[2]	0		0						3,152	[2]	51	51					0	[2]	0	0			0
Collectively evaluated for impairment	572,306		572,306								575,874		47,336	47,336	142,166	142,166					109,843	[2]	294,324	294,324					357,507	[2]	38,469	38,469					37,584	[2]	18,121		18,121						41,233	[2]	31,890	31,890					29,707	[2]	0	0			0
Total	586,223		586,223				588,470				588,470		52,047	52,047	143,524	143,524					110,081	[2]	301,575	301,575					366,574	[2]	39,015	39,015					37,723	[2]	18,121		18,121						44,385	[2]	31,941	31,941					29,707	[2]	0	0			0
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)			1.39%		1.43%		1.37%
Ratio of net charge-offs to average loans, net of unearned income and deferred fees (in hundredths)			0.57%	[3]	0.25%	[3]	0.43%	[3]
Nonperforming assets [Abstract]
Loan Receivable Nonaccrual	3,627		3,627		1,819		1,398
Restructured loans in nonaccrual	3,763		3,763		5,030		3,806
Total nonperforming loans	7,390		7,390		6,849		5,204				5,204	[2]																											0		0
Other real estate owned, net	871		871		1,855		1,489
Total nonperforming assets	8,261		8,261		8,704		6,693
Ratio of nonperforming assets to loans, net of unearned income and deferred fees, plus other real estate owned (in hundredths)	1.41%		1.41%		1.46%		1.13%
Ratio of allowance for loan losses to nonperforming loans (in hundredths)	110.53%	[4]	110.53%	[4]	124.02%	[4]	155.03%	[4]
Summary of loans past due 90 days or more and impaired loans [Abstract]
Loans past due 90 days or more and still accruing	242		242		572		481				481	[2]																											0		0
Ratio of loans past due 90 days or more and still accruing to loans, net of unearned income and deferred fees	0.04%		0.04%		0.10%		0.08%
Accruing restructured loans	2,035		2,035		780		3,756
Impaired loans:
Impaired loans with no valuation allowance	12,374		12,374		2,377		5,505
Impaired loans with a valuation allowance	1,543		1,543		5,054		7,091
Total impaired loans	13,917		13,917		7,431		12,596				12,596	[5],[6]																											0		0
Valuation allowance	(362)		(362)		(1,191)		(1,123)				(1,123)	[5],[6]																											0		0
Impaired loans, net of allowance	13,555		13,555		6,240		11,473
Average recorded investment in impaired loans	14,055	[7]	14,055	[7],[8]	7,733	[8]	8,734	[8]			8,734	[5],[6],[7]																											0	[7]	0	[7]
Interest income recognized on impaired loans, after designation as impaired	186		186		24		141				141	[5],[6]																											0		0
Amount of income recognized on a cash basis			$ 0		$ 0		$ 0
Number of days loans past due, minimum (in days)			90 days

[1] Segments at June 30, 2011 are reported using the segmentation method in effect for 2011. The Company began reporting under revised segments beginning in 2012.

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

[3] Net charge-offs are on an annualized basis.

[4] The Company defines nonperforming loans as nonaccrual loans. Loans 90 days or more past due and still accruing and accruing restructured loans are excluded.

[5] Only classes with impaired loans are shown.

[6] 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.

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

[8] Recorded investment includes principal, accrued interest and net deferred fees.