Loans and Leases, Part III (Details) (USD $)	3 Months Ended			9 Months Ended			12 Months Ended
	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	$ 21,653,000			$ 21,653,000			$ 22,834,000
Recorded Investment With No Allowance	11,198,000			11,198,000			13,452,000
Recorded Investment With Allowance	10,500,000	[1]		10,500,000	[1]		8,479,000	[2]
Total Recorded Investment	21,698,000			21,698,000			21,931,000
Related Allowance	941,000			941,000			658,000
Average recorded investment	21,698,000		21,143,000	20,771,000		28,317,000	27,039,000
Interest recognized	336,000		113,000	553,000		366,000	468,000
Accrued interest receivable				45,000			24,000
Total Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	698,000			698,000			1,597,000
Recorded Investment With No Allowance	284,000			284,000			855,000
Recorded Investment With Allowance	418,000	[1]		418,000	[1]		576,000	[2]
Total Recorded Investment	702,000			702,000			1,431,000
Related Allowance	5,000			5,000			37,000
Average recorded investment				929,000			5,615,000
Interest recognized				40,000			26,000
Commercial and Business Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	698,000			698,000			1,488,000
Recorded Investment With No Allowance	284,000			284,000			767,000
Recorded Investment With Allowance	418,000	[1]		418,000	[1]		576,000	[2]
Total Recorded Investment	702,000			702,000			1,343,000
Related Allowance	5,000			5,000			37,000
Average recorded investment				882,000			5,468,000
Interest recognized				40,000			26,000
Government Program Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	0			0			109,000
Recorded Investment With No Allowance	0			0			88,000
Recorded Investment With Allowance	0	[1]		0	[1]		0	[2]
Total Recorded Investment	0			0			88,000
Related Allowance	0			0			0
Average recorded investment				47,000			147,000
Interest recognized				0			0
Total Real Estate Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	17,439,000			17,439,000			18,864,000
Recorded Investment With No Allowance	7,692,000			7,692,000			10,554,000
Recorded Investment With Allowance	9,766,000	[1]		9,766,000	[1]		7,903,000	[2]
Total Recorded Investment	17,458,000			17,458,000			18,457,000
Related Allowance	848,000			848,000			621,000
Average recorded investment				17,241,000			12,935,000
Interest recognized				437,000			386,000
Commercial Real Estate Term Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	11,995,000			11,995,000			11,393,000
Recorded Investment With No Allowance	5,982,000			5,982,000			6,818,000
Recorded Investment With Allowance	6,022,000	[1]		6,022,000	[1]		4,237,000	[2]
Total Recorded Investment	12,004,000			12,004,000			11,055,000
Related Allowance	739,000			739,000			436,000
Average recorded investment				10,832,000			8,498,000
Interest recognized				275,000			135,000
Residential Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	5,444,000			5,444,000			7,461,000
Recorded Investment With No Allowance	1,710,000			1,710,000			3,726,000
Recorded Investment With Allowance	3,744,000	[1]		3,744,000	[1]		3,666,000	[2]
Total Recorded Investment	5,454,000			5,454,000			7,392,000
Related Allowance	109,000			109,000			185,000
Average recorded investment				6,391,000			4,416,000
Interest recognized				162,000			251,000
Home Improvement and Home Equity Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	0			0			10,000
Recorded Investment With No Allowance	0			0			10,000
Recorded Investment With Allowance		[1]			[1]		0	[2]
Total Recorded Investment	0			0			10,000
Related Allowance	0			0			0
Average recorded investment				18,000			21,000
Interest recognized				0			0
RE Construction and Development Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	3,420,000			3,420,000			1,730,000
Recorded Investment With No Allowance	3,126,000			3,126,000			1,730,000
Recorded Investment With Allowance	316,000	[1]		316,000	[1]		0	[2]
Total Recorded Investment	3,442,000			3,442,000			1,730,000
Related Allowance	88,000			88,000			0
Average recorded investment				2,425,000			7,298,000
Interest recognized				66,000			0
Agricultural Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	48,000			48,000			504,000
Recorded Investment With No Allowance	48,000			48,000			192,000
Recorded Investment With Allowance	0	[1]		0	[1]		0	[2]
Total Recorded Investment	48,000			48,000			192,000
Related Allowance	0			0			0
Average recorded investment				96,000			991,000
Interest recognized				7,000			50,000
Total Installment/Other [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	48,000			48,000			139,000
Recorded Investment With No Allowance	48,000			48,000			121,000
Recorded Investment With Allowance	0	[1]		0	[1]		0	[2]
Total Recorded Investment	48,000			48,000			121,000
Related Allowance	0			0			0
Average recorded investment				80,000			200,000
Interest recognized				3,000			6,000
Consumer Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	48,000			48,000			139,000
Recorded Investment With No Allowance	48,000			48,000			121,000
Recorded Investment With Allowance	0	[1]		0	[1]		0	[2]
Total Recorded Investment	48,000			48,000			121,000
Related Allowance	0			0			0
Average recorded investment				80,000			200,000
Interest recognized				3,000			6,000
Overdraft Protection Lines [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	0			0			0
Recorded Investment With No Allowance	0			0			0
Recorded Investment With Allowance	0	[1]		0	[1]		0	[2]
Total Recorded Investment	0			0			0
Related Allowance	0			0			0
Average recorded investment				0			0
Interest recognized				0			0
Overdrafts [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	0			0			0
Recorded Investment With No Allowance	0			0			0
Recorded Investment With Allowance	0	[1]		0	[1]		0	[2]
Total Recorded Investment	0			0			0
Related Allowance	0			0			0
Average recorded investment				0			0
Interest recognized				0			0
Commercial Lease Financing [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	0			0			0
Recorded Investment With No Allowance	0			0			0
Recorded Investment With Allowance	0	[1]		0	[1]		0	[2]
Total Recorded Investment	0			0			0
Related Allowance	0			0			0
Average recorded investment				0			0
Interest recognized				$ 0			$ 0

[1] The recorded investment in loans includes accrued interest receivable of $45,000.

[2] The recorded investment in loans includes accrued interest receivable of 24,000,