Allowance For Credit Losses (Impaired Loans by Loan Portfolio) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	$ 7,032		$ 7,032	$ 3,005
Recorded Investment, With allowance recorded	2,114		2,114	3,971
Related Allowance, With allowance recorded	851	1,185	851	578	1,185
Recorded Investment, Total	9,146	7,574	9,146	6,976	7,574
Unpaid Principal Balance, Total	11,223	8,788	11,223		8,788
Related Allowance, Total	851	1,185	851	578	1,185
Average Recorded Investment, Total	8,240	7,780	8,018	7,073	7,356
Interest Income Recognized, Total	56		56	6	59
Residential mortgage [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	2,428	2,014	2,428		2,014
Unpaid Principal Balance, With no related allowance recorded	2,844	2,413	2,844		2,413
Average Recorded Investment, With no related allowance recorded	2,212	1,262	2,146		1,095
Average Recorded Investment, With allowance recorded		755			959
Recorded Investment, Total	2,428	2,014	2,428		2,014
Unpaid Principal Balance, Total	2,844	2,413	2,844		2,413
Average Recorded Investment, Total	2,212	2,017	2,146		2,054
Commercial mortgage [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	239		239
Unpaid Principal Balance, With no related allowance recorded	245		245
Average Recorded Investment, With no related allowance recorded	223	1,019	149		821
Interest Income Recognized, With no related allowance recorded	1		1		58
Recorded Investment, With allowance recorded	83	2,114	83		2,114
Unpaid Principal Balance, With allowance recorded	85	2,116	85		2,116
Related Allowance, With allowance recorded	45	826	45		826
Average Recorded Investment, With allowance recorded	83	1,057	760		444
Recorded Investment, Total	322	2,114	322		2,114
Unpaid Principal Balance, Total	330	2,116	330		2,116
Related Allowance, Total	45	826	45		826
Average Recorded Investment, Total	306	2,076	909		1,265
Interest Income Recognized, Total	1		1		58
Commercial term [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	87	202	87		202
Unpaid Principal Balance, With no related allowance recorded	442	566	442		566
Average Recorded Investment, With no related allowance recorded	144	217	163		206
Interest Income Recognized, With no related allowance recorded	12		12		1
Average Recorded Investment, With allowance recorded		192			450
Recorded Investment, Total	87	202	87		202
Unpaid Principal Balance, Total	442	566	442		566
Average Recorded Investment, Total	144	409	163		656
Interest Income Recognized, Total	12		12		1
Commercial construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	4,059	312	4,059		312
Unpaid Principal Balance, With no related allowance recorded	5,342	634	5,342		634
Average Recorded Investment, With no related allowance recorded	3,333	156	2,326		339
Recorded Investment, With allowance recorded	2,031	2,720	2,031		2,720
Unpaid Principal Balance, With allowance recorded	2,031	2,833	2,031		2,833
Related Allowance, With allowance recorded	806	359	806		359
Average Recorded Investment, With allowance recorded	2,031	2,952	2,261		2,813
Interest Income Recognized, With allowance recorded	39		39
Recorded Investment, Total	6,090	3,032	6,090		3,032
Unpaid Principal Balance, Total	7,373	3,467	7,373		3,467
Related Allowance, Total	806	359	806		359
Average Recorded Investment, Total	5,364	3,108	4,587		3,152
Interest Income Recognized, Total	39		39
Leases financing [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	60	61	60		61
Unpaid Principal Balance, With no related allowance recorded	74	74	74		74
Average Recorded Investment, With no related allowance recorded	60	63	60		123
Average Recorded Investment, With allowance recorded					27
Recorded Investment, Total	60	61	60		61
Unpaid Principal Balance, Total	74	74	74		74
Average Recorded Investment, Total	60	63	60		150
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	159	151	159		151
Unpaid Principal Balance, With no related allowance recorded	160	152	160		152
Average Recorded Investment, With no related allowance recorded	154	107	153		79
Interest Income Recognized, With no related allowance recorded	4		4
Recorded Investment, Total	159	151	159		151
Unpaid Principal Balance, Total	160	152	160		152
Average Recorded Investment, Total	154	107	153		79
Interest Income Recognized, Total	$ 4		$ 4

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 17

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5258-111524

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524

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