Loans (Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011	Sep. 30, 2012		Sep. 30, 2011	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Total Recorded Investment of Impaired Loans	$ 30,044	[1]		$ 30,044	[1]		$ 29,079	[1]
Total Unpaid Principal of Impaired Loans	32,581			32,581			32,558
Related Allowance on Impaired Loans	2,023			2,023			1,815
Average Recorded Investment of Impaired Loans	24,572		27,830	24,874		31,278
Interest Income Recognized on Impaired Loans	169		237	487		881
Accrued Interest	51			51			46
Accrued Income Receivable [Member]
Financing Receivable, Impaired [Line Items]
Accrued Interest	53			53			46
Commercial Segment [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment of Impaired Loans	25,219	[1]		25,219	[1]		22,477	[1]
Total Unpaid Principal of Impaired Loans	27,303			27,303			25,196
Related Allowance on Impaired Loans	1,510			1,510			1,168
Residential Segment [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment of Impaired Loans	4,352	[1]		4,352	[1]		5,989	[1]
Total Unpaid Principal of Impaired Loans	4,707			4,707			6,609
Related Allowance on Impaired Loans	510			510			495
Consumer Segment [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment of Impaired Loans	473	[1]		473	[1]		613	[1]
Total Unpaid Principal of Impaired Loans	571			571			753
Related Allowance on Impaired Loans	3			3			152
Class of Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment of Impaired Loans with No Related Allowance	5,695	[1]		5,695	[1]		11,098
Recorded Investment of Impaired Loans with Related Allowance	24,349	[1]		24,349	[1]		17,981	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	5,729			5,729			11,167
Unpaid Principal of Impaired Loans with Related Allowance	26,852			26,852			21,391
No Related Allowance on Impaired Loans	0			0			0
Related Allowance on Impaired Loans	2,023			2,023			1,815
Commercial Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment of Impaired Loans with No Related Allowance	914	[1]		914	[1]		7,093	[1]
Recorded Investment of Impaired Loans with Related Allowance	14,205	[1]		14,205	[1]		5,023	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	915			915			7,076
Unpaid Principal of Impaired Loans with Related Allowance	15,641			15,641			6,760
No Related Allowance on Impaired Loans	0			0			0
Related Allowance on Impaired Loans	939			939			329
Average Recorded Investment of Impaired Loans	9,611		14,150	8,795		15,829
Interest Income Recognized on Impaired Loans	71		111	176		433
Commercial Construction and Development [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment of Impaired Loans with No Related Allowance	0	[1]		0	[1]		0	[1]
Recorded Investment of Impaired Loans with Related Allowance	0	[1]		0	[1]		0	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	0			0			0
Unpaid Principal of Impaired Loans with Related Allowance	0			0			0
No Related Allowance on Impaired Loans	0			0			0
Related Allowance on Impaired Loans	0			0			0
Average Recorded Investment of Impaired Loans	0		0	0		0
Interest Income Recognized on Impaired Loans	0		0	0		0
Commercial Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment of Impaired Loans with No Related Allowance	2,140	[1]		2,140	[1]		1,622	[1]
Recorded Investment of Impaired Loans with Related Allowance	7,960	[1]		7,960	[1]		8,739	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	2,136			2,136			1,620
Unpaid Principal of Impaired Loans with Related Allowance	8,611			8,611			9,740
No Related Allowance on Impaired Loans	0			0			0
Related Allowance on Impaired Loans	571			571			839
Average Recorded Investment of Impaired Loans	10,176		7,330	10,756		9,109
Interest Income Recognized on Impaired Loans	73		80	231		291
Residential Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment of Impaired Loans with No Related Allowance	2,641	[1]		2,641	[1]		2,383	[1]
Recorded Investment of Impaired Loans with Related Allowance	1,711	[1]		1,711	[1]		3,606	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	2,678			2,678			2,471
Unpaid Principal of Impaired Loans with Related Allowance	2,029			2,029			4,138
No Related Allowance on Impaired Loans	0			0			0
Related Allowance on Impaired Loans	510			510			495
Average Recorded Investment of Impaired Loans	4,400		5,822	4,867		5,658
Interest Income Recognized on Impaired Loans	21		38	66		127
Homeowner Construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment of Impaired Loans with No Related Allowance	0	[1]		0	[1]		0	[1]
Recorded Investment of Impaired Loans with Related Allowance	0	[1]		0	[1]		0	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	0			0			0
Unpaid Principal of Impaired Loans with Related Allowance	0			0			0
No Related Allowance on Impaired Loans	0			0			0
Related Allowance on Impaired Loans	0			0			0
Average Recorded Investment of Impaired Loans	0		0	0		0
Interest Income Recognized on Impaired Loans	0		0	0		0
Home Equity Lines [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment of Impaired Loans with No Related Allowance	0	[1]		0	[1]		0	[1]
Recorded Investment of Impaired Loans with Related Allowance	188	[1]		188	[1]		278	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	0			0			0
Unpaid Principal of Impaired Loans with Related Allowance	255			255			373
No Related Allowance on Impaired Loans	0			0			0
Related Allowance on Impaired Loans	1			1			82
Average Recorded Investment of Impaired Loans	121		116	167		106
Interest Income Recognized on Impaired Loans	0		1	2		4
Home Equity Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment of Impaired Loans with No Related Allowance	0	[1]		0	[1]		0	[1]
Recorded Investment of Impaired Loans with Related Allowance	122	[1]		122	[1]		130	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	0			0			0
Unpaid Principal of Impaired Loans with Related Allowance	145			145			153
No Related Allowance on Impaired Loans	0			0			0
Related Allowance on Impaired Loans	1			1			1
Average Recorded Investment of Impaired Loans	120		167	138		340
Interest Income Recognized on Impaired Loans	2		3	5		14
Other Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment of Impaired Loans with No Related Allowance	0	[1]		0	[1]		0	[1]
Recorded Investment of Impaired Loans with Related Allowance	163	[1]		163	[1]		205	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	0			0			0
Unpaid Principal of Impaired Loans with Related Allowance	171			171			227
No Related Allowance on Impaired Loans	0			0			0
Related Allowance on Impaired Loans	1			1			69
Average Recorded Investment of Impaired Loans	144		245	151		236
Interest Income Recognized on Impaired Loans	$ 2		$ 4	$ 7		$ 12

[1] The recorded investment in impaired loans consists of unpaid principal balance, net of charge-offs, interest payments received applied to principal and unamortized deferred loan origination fees and costs. For impaired accruing loans (including those troubled debt restructurings for which management has concluded that the collectibility of the loan is not in doubt), the recorded investment also includes accrued interest. As of September 30, 2012 and December 31, 2011, recorded investment in impaired loans included accrued interest of $53 thousand and $46 thousand, respectively.