Loans and Allowance for Loan and Lease Losses (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2013 loan	Jun. 30, 2013 loan	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Number of Contracts	4	5
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down			$ 0
Financing Receivable, Modifications, Recorded Investment1		8,877	3,394
Residential mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan Terms		30 years
Loan To Value Ratio	100.00%	100.00%
Loan To Value Ratio, Exposure After Private Mortgage Insurance		85.00%
Financing Receivable, Modifications, Number of Contracts	1	2
Financing Receivable, Modifications, Recorded Investment1		461	448
Commercial and industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan Terms		1 year
Loan To Value Ratio	80.00%	80.00%
Financing Receivable, Modifications, Recorded Investment1		30	30
Home equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan Terms		20 years
Loan To Value Ratio	85.00%	85.00%
Lease financing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Portfolio Percentage	0.31%	0.31%
Home Equity Lines Of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan Terms		5 years
Commercial real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Number of Contracts	3	3
Impaired Financing Receivable, Interest Income, Cash Basis Method	47	64
Financing Receivable, Modifications, Recorded Investment1		8,386	2,916
Nonaccruing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Number of Contracts		15	10
Financing Receivable, Modifications, Recorded Investment1		7,995	2,968
Nonaccruing [Member] | Customer Three [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Number of Contracts			5
Financing Receivable, Modifications, Recorded Investment1			634
Accruing [Member] | Residential mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Number of Contracts		4
Troubled Debt Restructurings - Prior Year Singular Business Relationship 1 [Member] | Nonaccruing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Number of Contracts		5
Financing Receivable, Modifications, Recorded Investment1		612
Commercial Participation Loans [Member] | Nonaccruing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Number of Contracts		3	3
Financing Receivable, Modifications, Recorded Investment1		1,566	1,663
Unrelated Nonparticipation Loans [Member] | Nonaccruing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Number of Contracts		7	2
Financing Receivable, Modifications, Recorded Investment1		5,817	671
Unrelated Nonparticipation Loans [Member] | Nonaccruing [Member] | Residential mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Number of Contracts			7
Unrelated Nonparticipation Loans [Member] | Nonaccruing [Member] | Commercial real estate [Member] | Customer One [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Recorded Investment1		1,671
Unrelated Nonparticipation Loans [Member] | Nonaccruing [Member] | Commercial real estate [Member] | Customer Two [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Recorded Investment1		3,275
Unrelated Nonparticipation Loans [Member] | Accruing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Recorded Investment1		882
Unrelated Nonparticipation Loans [Member] | Accruing [Member] | Residential mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Recorded Investment1			426
Unrelated Nonparticipation Loans [Member] | Accruing [Member] | Commercial real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Number of Contracts		1
Financing Receivable, Modifications, Recorded Investment1		$ 642