Loans (Impaired Loans) (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Recorded Investment of Impaired Loans with No Related Allowance	$ 4,728,000	[1]		$ 4,728,000	[1]		$ 4,709,000	[1]
Recorded Investment of Impaired Loans with Related Allowance	35,021,000	[1]		35,021,000	[1]		30,853,000	[1]
Total Recorded Investment of Impaired Loans	39,749,000	[1]		39,749,000	[1]		35,562,000	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	8,768,000			8,768,000			4,732,000
Unpaid Principal of Impaired Loans with Related Allowance	37,411,000			37,411,000			33,926,000
Impaired Financing Receivable, No Related Allowance	0			0			0
Total Unpaid Principal of Impaired Loans	46,179,000			46,179,000			38,658,000
Related Allowance on Impaired Loans	2,013,000			2,013,000			2,880,000
Average Recorded Investment of Impaired Loans	37,146,000		24,572,000	37,805,000		24,874,000
Interest Income Recognized on Impaired Loans	291,000		169,000	718,000		487,000
Commercial Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment of Impaired Loans with No Related Allowance	2,913,000	[1]		2,913,000	[1]		2,357,000	[1]
Recorded Investment of Impaired Loans with Related Allowance	29,972,000	[1]		29,972,000	[1]		17,897,000	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	6,940,000			6,940,000			2,360,000
Unpaid Principal of Impaired Loans with Related Allowance	31,596,000			31,596,000			19,738,000
Impaired Financing Receivable, No Related Allowance	0			0			0
Related Allowance on Impaired Loans	1,110,000			1,110,000			1,720,000
Average Recorded Investment of Impaired Loans	29,430,000		9,611,000	26,110,000		8,795,000
Interest Income Recognized on Impaired Loans	192,000		71,000	444,000		176,000
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
Impaired Financing Receivable, No Related Allowance	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	1,633,000	[1]		1,633,000	[1]		1,058,000	[1]
Recorded Investment of Impaired Loans with Related Allowance	1,196,000	[1]		1,196,000	[1]		9,939,000	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	1,629,000			1,629,000			1,057,000
Unpaid Principal of Impaired Loans with Related Allowance	1,572,000			1,572,000			10,690,000
Impaired Financing Receivable, No Related Allowance	0			0			0
Related Allowance on Impaired Loans	331,000			331,000			694,000
Average Recorded Investment of Impaired Loans	3,536,000		10,176,000	7,159,000		10,756,000
Interest Income Recognized on Impaired Loans	43,000		73,000	157,000		231,000
Residential Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment of Impaired Loans with No Related Allowance	182,000	[1]		182,000	[1]		1,294,000	[1]
Recorded Investment of Impaired Loans with Related Allowance	3,494,000	[1]		3,494,000	[1]		2,576,000	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	199,000			199,000			1,315,000
Unpaid Principal of Impaired Loans with Related Allowance	3,882,000			3,882,000			2,947,000
Impaired Financing Receivable, No Related Allowance	0			0			0
Related Allowance on Impaired Loans	569,000			569,000			463,000
Average Recorded Investment of Impaired Loans	3,818,000		4,400,000	4,104,000		4,867,000
Interest Income Recognized on Impaired Loans	51,000		21,000	100,000		66,000
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
Impaired Financing Receivable, No Related Allowance	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	173,000	[1]		173,000	[1]		187,000	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	0			0			0
Unpaid Principal of Impaired Loans with Related Allowance	174,000			174,000			255,000
Impaired Financing Receivable, No Related Allowance	0			0			0
Related Allowance on Impaired Loans	1,000			1,000			1,000
Average Recorded Investment of Impaired Loans	173,000		121,000	209,000		167,000
Interest Income Recognized on Impaired Loans	2,000		0	6,000		2,000
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	57,000	[1]		57,000	[1]		117,000	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	0			0			0
Unpaid Principal of Impaired Loans with Related Allowance	57,000			57,000			160,000
Impaired Financing Receivable, No Related Allowance	0			0			0
Related Allowance on Impaired Loans	0			0			0
Average Recorded Investment of Impaired Loans	58,000		120,000	77,000		138,000
Interest Income Recognized on Impaired Loans	1,000		2,000	5,000		5,000
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	129,000	[1]		129,000	[1]		137,000	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	0			0			0
Unpaid Principal of Impaired Loans with Related Allowance	130,000			130,000			136,000
Impaired Financing Receivable, No Related Allowance	0			0			0
Related Allowance on Impaired Loans	2,000			2,000			2,000
Average Recorded Investment of Impaired Loans	131,000		144,000	146,000		151,000
Interest Income Recognized on Impaired Loans	2,000		2,000	6,000		7,000
Commercial Segment [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment of Impaired Loans	35,714,000	[1]		35,714,000	[1]		31,251,000	[1]
Total Unpaid Principal of Impaired Loans	41,737,000			41,737,000			33,845,000
Related Allowance on Impaired Loans	1,441,000			1,441,000			2,414,000
Residential Segment [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment of Impaired Loans	3,676,000	[1]		3,676,000	[1]		3,870,000	[1]
Total Unpaid Principal of Impaired Loans	4,081,000			4,081,000			4,262,000
Related Allowance on Impaired Loans	569,000			569,000			463,000
Consumer Segment [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment of Impaired Loans	359,000	[1]		359,000	[1]		441,000	[1]
Total Unpaid Principal of Impaired Loans	361,000			361,000			551,000
Related Allowance on Impaired Loans	$ 3,000			$ 3,000			$ 3,000

[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 (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.