Allowance for Loan Losses, Nonperforming Assets and Impaired Loans, Financing Receivable, Impaired (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Investment in impaired loans and related allowance [Abstract]
Principal Balance	$ 18,456		$ 12,596		$ 8,791
(A) Total Recorded Investment	18,422	[1]
Recorded Investment in (A) for Which There is No Related Allowance	16,940	[1]
Recorded Investment in (A) for Which There is a Related Allowance	1,482	[1]
Related Allowance	554		1,123		1,200
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	13,540	[1]	8,734		7,526
Interest Income Recognized	9		141		17
Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	11,053		12,596	[2]	8,791	[2]
(A) Total Recorded Investment	11,037		12,608	[1],[2]	8,808	[1],[2]
Recorded Investment in (A) for Which There is No Related Allowance	10,407		5,506	[1],[2]	1,132	[1],[2]
Recorded Investment in (A) for Which There is a Related Allowance	630		7,102	[1],[2]	7,676	[1],[2]
Related Allowance	269		1,123	[2]	1,200	[2]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	13,520	[3]	8,734	[1],[2]	7,526	[1],[2]
Interest Income Recognized			141	[2]	17	[2]
Commercial and Industrial [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance			139	[2],[4]	698	[2],[4]
(A) Total Recorded Investment			139	[1],[2],[4]	698	[1],[2],[4]
Recorded Investment in (A) for Which There is No Related Allowance			0	[1],[2],[4]	0	[1],[2],[4]
Recorded Investment in (A) for Which There is a Related Allowance			139	[1],[2],[4]	698	[1],[2],[4]
Related Allowance			62	[2],[4]	508	[2],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment			553	[1],[2],[4]	1,183	[1],[2],[4]
Interest Income Recognized			0	[2],[4]	0	[2],[4]
Real Estate Construction [Member] | Construction, Residential [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	123
(A) Total Recorded Investment	118	[1]
Recorded Investment in (A) for Which There is No Related Allowance	118	[1]
Recorded Investment in (A) for Which There is a Related Allowance	0	[1]
Related Allowance	0
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	1,171	[1]
Interest Income Recognized	0
Real Estate Construction [Member] | Construction, Other [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	6,520
(A) Total Recorded Investment	6,487	[1]
Recorded Investment in (A) for Which There is No Related Allowance	6,487	[1]
Recorded Investment in (A) for Which There is a Related Allowance	0	[1]
Related Allowance	0
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	4,290	[1]
Interest Income Recognized	1
Real Estate Construction [Member] | Construction, Other [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	3,500
(A) Total Recorded Investment	3,481
Recorded Investment in (A) for Which There is No Related Allowance	3,481
Recorded Investment in (A) for Which There is a Related Allowance	0
Related Allowance	0
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	4,282
Consumer Real Estate [Member] | Equity Lines [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	0
(A) Total Recorded Investment	0	[1]
Recorded Investment in (A) for Which There is No Related Allowance	0	[1]
Recorded Investment in (A) for Which There is a Related Allowance	0	[1]
Related Allowance	0
Consumer Real Estate [Member] | Residential Closed end First Liens [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	783
(A) Total Recorded Investment	785	[1]
Recorded Investment in (A) for Which There is No Related Allowance	634	[1]
Recorded Investment in (A) for Which There is a Related Allowance	151	[1]
Related Allowance	43
Consumer Real Estate [Member] | Residential Closed end Junior Liens [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	81
(A) Total Recorded Investment	81	[1]
Recorded Investment in (A) for Which There is No Related Allowance	81	[1]
Recorded Investment in (A) for Which There is a Related Allowance	0	[1]
Related Allowance	0
Consumer Real Estate [Member] | Closed end Consumer Real Estate [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance			237	[2],[4]	505	[2],[4]
(A) Total Recorded Investment			237	[1],[2],[4]	505	[1],[2],[4]
Recorded Investment in (A) for Which There is No Related Allowance			237	[1],[2],[4]	0	[1],[2],[4]
Recorded Investment in (A) for Which There is a Related Allowance			0	[1],[2],[4]	505	[1],[2],[4]
Related Allowance			0	[2],[4]	26	[2],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment			450	[1],[2],[4]	337	[1],[2],[4]
Interest Income Recognized			3	[2],[4]	0	[2],[4]
Commercial Real Estate [Member] | Equity Lines [Member]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	101	[1]
Interest Income Recognized	0
Commercial Real Estate [Member] | Residential Closed end First Liens [Member]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	873	[1]
Interest Income Recognized	2
Commercial Real Estate [Member] | Residential Closed end Junior Liens [Member]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	234	[1]
Interest Income Recognized	0
Commercial Real Estate [Member] | Multifamily Real Estate [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	5,284
(A) Total Recorded Investment	5,288	[1]
Recorded Investment in (A) for Which There is No Related Allowance	5,288	[1]
Recorded Investment in (A) for Which There is a Related Allowance	0	[1]
Related Allowance	0
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	1,466	[1]
Interest Income Recognized	5
Commercial Real Estate [Member] | Multifamily Real Estate [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	1,752
(A) Total Recorded Investment	1,760
Recorded Investment in (A) for Which There is No Related Allowance	1,760
Recorded Investment in (A) for Which There is a Related Allowance	0
Related Allowance	0
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	1,456
Commercial Real Estate [Member] | Commercial Real Estate, Owner Occupied [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	5,045
(A) Total Recorded Investment	5,043	[1]
Recorded Investment in (A) for Which There is No Related Allowance	4,293	[1]
Recorded Investment in (A) for Which There is a Related Allowance	750	[1]
Related Allowance	273
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	4,806	[1]
Interest Income Recognized	1
Commercial Real Estate [Member] | Commercial Real Estate, Owner Occupied [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	4,296
(A) Total Recorded Investment	4,293
Recorded Investment in (A) for Which There is No Related Allowance	4,293
Recorded Investment in (A) for Which There is a Related Allowance	0
Related Allowance	0
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	4,804
Commercial Real Estate [Member] | Commercial Real Estate, Other [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	0
(A) Total Recorded Investment	0	[1]
Recorded Investment in (A) for Which There is No Related Allowance	0	[1]
Recorded Investment in (A) for Which There is a Related Allowance	0	[1]
Related Allowance	0
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	0	[1]
Interest Income Recognized	0
Commercial Real Estate [Member] | Commercial Real Estate, Other [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance			1,113	[2],[4]	1,065	[2],[4]
(A) Total Recorded Investment			1,112	[1],[2],[4]	1,066	[1],[2],[4]
Recorded Investment in (A) for Which There is No Related Allowance			425	[1],[2],[4]	0	[1],[2],[4]
Recorded Investment in (A) for Which There is a Related Allowance			687	[1],[2],[4]	1,066	[1],[2],[4]
Related Allowance			474	[2],[4]	299	[2],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment			1,139	[1],[2],[4]	337	[1],[2],[4]
Interest Income Recognized			24	[2],[4]	1	[2],[4]
Commercial Real Estate [Member] | Hotels [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance			3,319	[2],[4]	3,509	[2],[4]
(A) Total Recorded Investment			3,320	[1],[2],[4]	3,509	[1],[2],[4]
Recorded Investment in (A) for Which There is No Related Allowance			2,794	[1],[2],[4]	287	[1],[2],[4]
Recorded Investment in (A) for Which There is a Related Allowance			526	[1],[2],[4]	3,222	[1],[2],[4]
Related Allowance			16	[2],[4]	267	[2],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment			3,445	[1],[2],[4]	2,767	[1],[2],[4]
Interest Income Recognized			41	[2],[4]	0	[2],[4]
Commercial Real Estate [Member] | Medical Professionals [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance			66	[2],[4]
(A) Total Recorded Investment			67	[1],[2],[4]
Recorded Investment in (A) for Which There is No Related Allowance			0	[1],[2],[4]
Recorded Investment in (A) for Which There is a Related Allowance			67	[1],[2],[4]
Related Allowance			66	[2],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment			67	[1],[2],[4]	0	[1],[2],[4]
Interest Income Recognized			5	[2],[4]	0	[2],[4]
Commercial Real Estate [Member] | General Contractors [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance			703	[2],[4]
(A) Total Recorded Investment			703	[1],[2],[4]
Recorded Investment in (A) for Which There is No Related Allowance			176	[1],[2],[4]
Recorded Investment in (A) for Which There is a Related Allowance			527	[1],[2],[4]
Related Allowance			402	[2],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment			112	[1],[2],[4]	0	[1],[2],[4]
Interest Income Recognized			4	[2],[4]	0	[2],[4]
Commercial Real Estate [Member] | College Housing [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance			366	[2],[4]
(A) Total Recorded Investment			366	[1],[2],[4]
Recorded Investment in (A) for Which There is No Related Allowance			366	[1],[2],[4]
Recorded Investment in (A) for Which There is a Related Allowance			0	[1],[2],[4]
Related Allowance			0	[2],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment			281	[1],[2],[4]	0	[1],[2],[4]
Interest Income Recognized			7	[2],[4]	0	[2],[4]
Commercial Real Estate [Member] | Convenience Stores [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance					577	[2],[4]
(A) Total Recorded Investment					592	[1],[2],[4]
Recorded Investment in (A) for Which There is No Related Allowance					592	[1],[2],[4]
Recorded Investment in (A) for Which There is a Related Allowance					0	[1],[2],[4]
Related Allowance					0	[2],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment			0	[1],[2],[4]	49	[1],[2],[4]
Interest Income Recognized			0	[2],[4]	15	[2],[4]
Commercial Real Estate [Member] | Office and Retail [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance			3,500	[2],[4]
(A) Total Recorded Investment			3,500	[1],[2],[4]
Recorded Investment in (A) for Which There is No Related Allowance			0	[1],[2],[4]
Recorded Investment in (A) for Which There is a Related Allowance			3,500	[1],[2],[4]
Related Allowance			57	[2],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment			292	[1],[2],[4]	253	[1],[2],[4]
Interest Income Recognized			0	[2],[4]	0	[2],[4]
Commercial Non Real Estate [Member] | Commercial and Industrial [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	574
(A) Total Recorded Investment	574	[1]
Recorded Investment in (A) for Which There is No Related Allowance	39	[1]
Recorded Investment in (A) for Which There is a Related Allowance	535	[1]
Related Allowance	231
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	570	[1]
Interest Income Recognized	0
Commercial Non Real Estate [Member] | Commercial and Industrial [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	518
(A) Total Recorded Investment	519
Recorded Investment in (A) for Which There is No Related Allowance	40
Recorded Investment in (A) for Which There is a Related Allowance	479
Related Allowance	226
Public Sector and IDA [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	0
(A) Total Recorded Investment	0	[1]
Recorded Investment in (A) for Which There is No Related Allowance	0	[1]
Recorded Investment in (A) for Which There is a Related Allowance	0	[1]
Related Allowance	0
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	0	[1]
Interest Income Recognized	0
Consumer Non Real Estate [Member] | Credit Cards [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	0
(A) Total Recorded Investment	0	[1]
Recorded Investment in (A) for Which There is No Related Allowance	0	[1]
Recorded Investment in (A) for Which There is a Related Allowance	0	[1]
Related Allowance	0
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	0	[1]
Interest Income Recognized	0
Consumer Non Real Estate [Member] | Automobile [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	46
(A) Total Recorded Investment	46	[1]
Recorded Investment in (A) for Which There is No Related Allowance	0	[1]
Recorded Investment in (A) for Which There is a Related Allowance	46	[1]
Related Allowance	7
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	4	[1]
Interest Income Recognized	0
Consumer Non Real Estate [Member] | Other Consumer [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	0
(A) Total Recorded Investment	0	[1]
Recorded Investment in (A) for Which There is No Related Allowance	0	[1]
Recorded Investment in (A) for Which There is a Related Allowance	0	[1]
Related Allowance	0
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	25	[1]
Interest Income Recognized	0
Construction Development and Land [Member] | Commercial [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance			252	[2],[4]	252	[2],[4]
(A) Total Recorded Investment			252	[1],[2],[4]	253	[1],[2],[4]
Recorded Investment in (A) for Which There is No Related Allowance			252	[1],[2],[4]	253	[1],[2],[4]
Recorded Investment in (A) for Which There is a Related Allowance			0	[1],[2],[4]	0	[1],[2],[4]
Related Allowance			0	[2],[4]	0	[2],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment			252	[1],[2],[4]	21	[1],[2],[4]
Interest Income Recognized			8	[2],[4]	1	[2],[4]
Construction Development and Land [Member] | Residential [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance			2,901	[2],[4]	2,185	[2],[4]
(A) Total Recorded Investment			2,912	[1],[2],[4]	2,185	[1],[2],[4]
Recorded Investment in (A) for Which There is No Related Allowance			1,256	[1],[2],[4]	0	[1],[2],[4]
Recorded Investment in (A) for Which There is a Related Allowance			1,656	[1],[2],[4]	2,185	[1],[2],[4]
Related Allowance			46	[2],[4]	100	[2],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment			2,143	[1],[2],[4]	2,579	[1],[2],[4]
Interest Income Recognized			$ 49	[2],[4]	$ 0	[2],[4]

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

[2] 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.

[3] 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.

[4] Only classes with impaired loans are shown.