Allowance for Loan and Lease Losses (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Balance	$ 25,458		$ 24,643
Orginated Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	234		0
Collectively evaluated for impairment	24,619		24,643
Ending Balance	24,853	24,598	24,643	26,865	26,948	27,593
Orginated Loans and Leases | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	234		0
Collectively evaluated for impairment	6,721		7,533
Ending Balance	6,955	7,037	7,533	7,807	8,270	8,936
Orginated Loans and Leases | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	10,409		10,184
Ending Balance	10,409	10,644	10,184	12,967	12,314	12,662
Orginated Loans and Leases | Residential real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	5,273		4,981
Ending Balance	5,273	5,036	4,981	4,350	4,491	4,247
Orginated Loans and Leases | Consumer and other, total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	2,195		1,940
Ending Balance	2,195	1,879	1,940	1,720	1,868	1,709
Orginated Loans and Leases | Finance Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	21		5
Ending Balance	21	2	5	21	5	39
Acquired Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	68
Collectively evaluated for impairment	537
Ending Balance	605	63	0
Acquired Loans and Leases | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0
Collectively evaluated for impairment	64
Ending Balance	64	0	0
Acquired Loans and Leases | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	68
Collectively evaluated for impairment	313
Ending Balance	381	63	0
Acquired Loans and Leases | Residential real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0
Collectively evaluated for impairment	126
Ending Balance	126	0	0
Acquired Loans and Leases | Consumer and other, total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0
Collectively evaluated for impairment	34
Ending Balance	34	0	0
Acquired Loans and Leases | Covered Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment	0
Collectively evaluated for impairment	0
Ending Balance	$ 0	$ 0	$ 0