Allowance For Credit Losses (Allowance for Credit Losses and Recorded Investments in Loans Receivables) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 6,838	$ 6,164	$ 6,164
Charge offs	15	(463)
Recoveries	120	16
Provision for Loan Lease and Other Losses	180	425
Ending balance	7,123	6,142	6,838
Ending balance: individually evaluated for impairment	1,733		1,015
Ending balance: collectively evaluated for impairment	5,390		5,823
Loans receivables, Ending Balance	402,033		396,498
Loans receivables, Ending Balance: individually evaluated for impairment	15,642		12,323
Loans receivable, Ending Balance: collectively evaluated for impairment	386,391		384,175
Reserve for unfunded loan commitments	165		125
Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	5,136	4,945	4,945
Charge offs	10	(437)
Recoveries	4	3
Provision for Loan Lease and Other Losses	759	456
Ending balance	5,889	4,967	5,136
Ending balance: individually evaluated for impairment	1,682		1,015
Ending balance: collectively evaluated for impairment	4,207		4,121
Loans receivables, Ending Balance	334,225		328,337
Loans receivables, Ending Balance: individually evaluated for impairment	12,705		9,698
Loans receivable, Ending Balance: collectively evaluated for impairment	321,520		318,639
Reserve for unfunded loan commitments	155		115
Lease financing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	3	10	10
Recoveries	51
Provision for Loan Lease and Other Losses	(52)	(3)
Ending balance	2	7
Ending balance: collectively evaluated for impairment	2		3
Loans receivables, Ending Balance	31		67
Loans receivables, Ending Balance: individually evaluated for impairment	26		28
Loans receivable, Ending Balance: collectively evaluated for impairment	5		39
Residential mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	306	383	383
Charge offs		(18)
Recoveries	65	5
Provision for Loan Lease and Other Losses	(44)	6
Ending balance	327	376
Ending balance: individually evaluated for impairment	51
Ending balance: collectively evaluated for impairment	276		306
Loans receivables, Ending Balance	25,184		25,835
Loans receivables, Ending Balance: individually evaluated for impairment	2,702		2,386
Loans receivable, Ending Balance: collectively evaluated for impairment	22,482		23,449
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	264	260	260
Charge offs	5	(8)
Recoveries		8
Provision for Loan Lease and Other Losses	4	13
Ending balance	263	273	264
Ending balance: collectively evaluated for impairment	263		264
Loans receivables, Ending Balance	42,593		42,259
Loans receivables, Ending Balance: individually evaluated for impairment	209		211
Loans receivable, Ending Balance: collectively evaluated for impairment	42,384		42,048
Reserve for unfunded loan commitments	10		10
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,129	566	566
Provision for Loan Lease and Other Losses	(487)	(47)
Ending balance	642	519
Ending balance: collectively evaluated for impairment	$ 642		$ 1,129