Allowance for Loan Losses, Nonperforming Assets and Impaired Loans, Financing Receivable, Impaired (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended				12 Months Ended
	Jun. 30, 2012		Jun. 30, 2012		Jun. 30, 2011		Dec. 31, 2011
Investment in impaired loans and related allowance [Abstract]
Principal Balance	$ 13,917		$ 13,917		$ 7,431		$ 12,596
(A) Total Recorded Investment	13,930	[1]	13,930	[1]
Recorded Investment in (A) for Which There is No Related Allowance	12,390		12,390
Recorded Investment in (A) for Which There is a Related Allowance	1,540		1,540
Related Allowance	362		362		1,191		1,123
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	14,055	[1]	14,055	[1],[2]	7,733	[2]	8,734	[2]
Interest Income Recognized	186		186		24		141
Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance							12,596	[3],[4]
(A) Total Recorded Investment							12,608	[1],[3],[4]
Recorded Investment in (A) for Which There is No Related Allowance							5,506	[3],[4]
Recorded Investment in (A) for Which There is a Related Allowance							7,102	[3],[4]
Related Allowance							1,123	[3],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment							8,734	[1],[3],[4]
Interest Income Recognized							141	[3],[4]
Commercial and Industrial [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance							139	[3],[4]
(A) Total Recorded Investment							139	[1],[3],[4]
Recorded Investment in (A) for Which There is No Related Allowance							0	[3],[4]
Recorded Investment in (A) for Which There is a Related Allowance							139	[3],[4]
Related Allowance							62	[3],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment							553	[1],[3],[4]
Interest Income Recognized							0	[3],[4]
Real Estate Construction [Member] | Construction, Residential [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	1,211		1,211
(A) Total Recorded Investment	1,206	[1]	1,206	[1]
Recorded Investment in (A) for Which There is No Related Allowance	1,206		1,206
Recorded Investment in (A) for Which There is a Related Allowance	0		0
Related Allowance	0		0
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	1,514	[1]	1,513	[1]
Interest Income Recognized	0		0
Real Estate Construction [Member] | Construction, other [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	3,500		3,500
(A) Total Recorded Investment	3,501	[1]	3,501	[1]
Recorded Investment in (A) for Which There is No Related Allowance	3,501		3,501
Recorded Investment in (A) for Which There is a Related Allowance	0		0
Related Allowance	0		0
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	6,699	[1]	5,112	[1]
Interest Income Recognized	1		119
Consumer Real Estate [Member] | Equity lines [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	200		200
(A) Total Recorded Investment	202	[1]	202	[1]
Recorded Investment in (A) for Which There is No Related Allowance	202		202
Recorded Investment in (A) for Which There is a Related Allowance	0		0
Related Allowance	0		0
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	136	[1]	68	[1]
Interest Income Recognized	0		2
Consumer Real Estate [Member] | Residential closed end first liens [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	990		990
(A) Total Recorded Investment	990	[1]	990	[1]
Recorded Investment in (A) for Which There is No Related Allowance	796		796
Recorded Investment in (A) for Which There is a Related Allowance	194		194
Related Allowance	54		54
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	1,068	[1]	879	[1]
Interest Income Recognized	0		3
Consumer Real Estate [Member] | Residential closed end junior liens [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	168		168
(A) Total Recorded Investment	168	[1]	168	[1]
Recorded Investment in (A) for Which There is No Related Allowance	168		168
Recorded Investment in (A) for Which There is a Related Allowance	0		0
Related Allowance	0		0
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	258	[1]	257	[1]
Interest Income Recognized	0		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	[3],[4]
(A) Total Recorded Investment							237	[1],[3],[4]
Recorded Investment in (A) for Which There is No Related Allowance							237	[3],[4]
Recorded Investment in (A) for Which There is a Related Allowance							0	[3],[4]
Related Allowance							0	[3],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment							450	[1],[3],[4]
Interest Income Recognized							3	[3],[4]
Commercial Real Estate [Member] | Multifamily real estate [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	2,092		2,092
(A) Total Recorded Investment	2,102	[1]	2,102	[1]
Recorded Investment in (A) for Which There is No Related Allowance	1,937		1,937
Recorded Investment in (A) for Which There is a Related Allowance	165		165
Related Allowance	35		35
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	1,291	[1]	914	[1]
Interest Income Recognized	0		10
Commercial Real Estate [Member] | Hotel [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance							3,319	[3],[4]
(A) Total Recorded Investment							3,320	[1],[3],[4]
Recorded Investment in (A) for Which There is No Related Allowance							2,794	[3],[4]
Recorded Investment in (A) for Which There is a Related Allowance							526	[3],[4]
Related Allowance							16	[3],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment							3,445	[1],[3],[4]
Interest Income Recognized							41	[3],[4]
Commercial Real Estate [Member] | Medical Professionals [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance							66	[3],[4]
(A) Total Recorded Investment							67	[1],[3],[4]
Recorded Investment in (A) for Which There is No Related Allowance							0	[3],[4]
Recorded Investment in (A) for Which There is a Related Allowance							67	[3],[4]
Related Allowance							66	[3],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment							67	[1],[3],[4]
Interest Income Recognized							5	[3],[4]
Commercial Real Estate [Member] | General Contractors [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance							703	[3],[4]
(A) Total Recorded Investment							703	[1],[3],[4]
Recorded Investment in (A) for Which There is No Related Allowance							176	[3],[4]
Recorded Investment in (A) for Which There is a Related Allowance							527	[3],[4]
Related Allowance							402	[3],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment							112	[1],[3],[4]
Interest Income Recognized							4	[3],[4]
Commercial Real Estate [Member] | Commercial real estate, other [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	0		0
(A) Total Recorded Investment	0	[1]	0	[1]
Recorded Investment in (A) for Which There is No Related Allowance	0		0
Recorded Investment in (A) for Which There is a Related Allowance	0		0
Related Allowance	0		0
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	0	[1]	0	[1]
Interest Income Recognized	0		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	[3],[4]
(A) Total Recorded Investment							1,112	[1],[3],[4]
Recorded Investment in (A) for Which There is No Related Allowance							425	[3],[4]
Recorded Investment in (A) for Which There is a Related Allowance							687	[3],[4]
Related Allowance							474	[3],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment							1,139	[1],[3],[4]
Interest Income Recognized							24	[3],[4]
Commercial Real Estate [Member] | College Housing [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance							366	[3],[4]
(A) Total Recorded Investment							366	[1],[3],[4]
Recorded Investment in (A) for Which There is No Related Allowance							366	[3],[4]
Recorded Investment in (A) for Which There is a Related Allowance							0	[3],[4]
Related Allowance							0	[3],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment							281	[1],[3],[4]
Interest Income Recognized							7	[3],[4]
Commercial Real Estate [Member] | Commercial real estate, owner occupied [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	5,159		5,159
(A) Total Recorded Investment	5,163	[1]	5,163	[1]
Recorded Investment in (A) for Which There is No Related Allowance	4,492		4,492
Recorded Investment in (A) for Which There is a Related Allowance	671		671
Related Allowance	21		21
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	5,206	[1]	4,653	[1]
Interest Income Recognized	0		50
Commercial Real Estate [Member] | Office and Retail [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance							3,500	[3],[4]
(A) Total Recorded Investment							3,500	[1],[3],[4]
Recorded Investment in (A) for Which There is No Related Allowance							0	[3],[4]
Recorded Investment in (A) for Which There is a Related Allowance							3,500	[3],[4]
Related Allowance							57	[3],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment							292	[1],[3],[4]
Interest Income Recognized							0	[3],[4]
Commercial Non Real Estate [Member] | Commercial and Industrial [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	546		546
(A) Total Recorded Investment	547	[1]	547	[1]
Recorded Investment in (A) for Which There is No Related Allowance	50		50
Recorded Investment in (A) for Which There is a Related Allowance	497		497
Related Allowance	243		243
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	553	[1]	606	[1]
Interest Income Recognized	0		2
Public Sector and IDA [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	0		0
(A) Total Recorded Investment	0	[1]	0	[1]
Recorded Investment in (A) for Which There is No Related Allowance	0		0
Recorded Investment in (A) for Which There is a Related Allowance	0		0
Related Allowance	0		0
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	0	[1]	0	[1]
Interest Income Recognized	0		0
Consumer Non Real Estate [Member] | Credit cards [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	0		0
(A) Total Recorded Investment	0	[1]	0	[1]
Recorded Investment in (A) for Which There is No Related Allowance	0		0
Recorded Investment in (A) for Which There is a Related Allowance	0		0
Related Allowance	0		0
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	0	[1]	0	[1]
Interest Income Recognized	0		0
Consumer Non Real Estate [Member] | Automobile [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	25		25
(A) Total Recorded Investment	25	[1]	25	[1]
Recorded Investment in (A) for Which There is No Related Allowance	12		12
Recorded Investment in (A) for Which There is a Related Allowance	13		13
Related Allowance	9		9
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	0	[1]	2	[1]
Interest Income Recognized	0		0
Consumer Non Real Estate [Member] | Other consumer loans [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance	26		26
(A) Total Recorded Investment	26	[1]	26	[1]
Recorded Investment in (A) for Which There is No Related Allowance	26		26
Recorded Investment in (A) for Which There is a Related Allowance	0		0
Related Allowance	0		0
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment	33	[1]	51	[1]
Interest Income Recognized	0		0
Construction Development and land [Member] | Commercial [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance							252	[3],[4]
(A) Total Recorded Investment							252	[1],[3],[4]
Recorded Investment in (A) for Which There is No Related Allowance							252	[3],[4]
Recorded Investment in (A) for Which There is a Related Allowance							0	[3],[4]
Related Allowance							0	[3],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment							252	[1],[3],[4]
Interest Income Recognized							8	[3],[4]
Construction Development and land [Member] | Residential [Member] | Scenario, Previously Reported [Member]
Investment in impaired loans and related allowance [Abstract]
Principal Balance							2,901	[3],[4]
(A) Total Recorded Investment							2,912	[1],[3],[4]
Recorded Investment in (A) for Which There is No Related Allowance							1,256	[3],[4]
Recorded Investment in (A) for Which There is a Related Allowance							1,656	[3],[4]
Related Allowance							46	[3],[4]
Impaired financing receivable average recorded investment and interest income recognized [Abstract]
Average Recorded Investment							2,143	[1],[3],[4]
Interest Income Recognized							$ 49	[3],[4]

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

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

[3] Only classes with impaired loans are shown.

[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.