Allowance for Credit Losses (Allowance For Credit Losses And Recorded Investments In Loans Receivables) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 5,373	$ 4,935	$ 4,935
Charge-offs	(349)	(97)
Recoveries	69	4
Provisions	325	330
Ending balance	5,418	5,172	5,373
Ending balance: individually evaluated for impairment	247		334
Ending balance: collectively evaluated for impairment	5,171		5,039
Ending balance: Loans receivables	816,363		817,529
Ending Balance: individually evaluated for impairment	6,681		6,919
Ending Balance: collectively evaluated for impairment	808,538		808,925
Reserve for unfunded loan commitments included in other liabilities	376	186	345
Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance: Loans receivables	1,144		1,685
Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	349	216	216
Charge-offs		(84)
Recoveries	2	1
Provisions	(104)	87
Ending balance	247	220	349
Ending balance: individually evaluated for impairment	39		143
Ending balance: collectively evaluated for impairment	208		206
Ending balance: Loans receivables	87,607		87,581
Ending Balance: individually evaluated for impairment	1,834		1,760
Ending Balance: collectively evaluated for impairment	85,762		85,810
Residential Mortgage [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance: Loans receivables	11		11
Commercial Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	2,531	2,375	2,375
Charge-offs	(234)
Recoveries	50
Provisions	250	1
Ending balance	2,597	2,376	2,531
Ending balance: collectively evaluated for impairment	2,597		2,531
Ending balance: Loans receivables	461,467		465,486
Ending Balance: individually evaluated for impairment	752		2,919
Ending Balance: collectively evaluated for impairment	459,582		460,893
Reserve for unfunded loan commitments included in other liabilities	10	3	4
Commercial Mortgage [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance: Loans receivables	1,133		1,674
Commercial Term [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	709	989	989
Charge-offs	(105)	(13)
Recoveries	16	1
Provisions	154	(29)
Ending balance	774	948	709
Ending balance: individually evaluated for impairment	203		97
Ending balance: collectively evaluated for impairment	571		612
Ending balance: Loans receivables	114,130		123,175
Ending Balance: individually evaluated for impairment	1,986		198
Ending Balance: collectively evaluated for impairment	112,144		122,977
Reserve for unfunded loan commitments included in other liabilities	147	115	135
Commercial Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	969	569	569
Charge-offs
Recoveries		1
Provisions	90	195
Ending balance	1,059	765	969
Ending balance: individually evaluated for impairment			89
Ending balance: collectively evaluated for impairment	1,059		880
Ending balance: Loans receivables	85,185		72,755
Ending Balance: individually evaluated for impairment	1,248		1,242
Ending Balance: collectively evaluated for impairment	83,937		71,513
Reserve for unfunded loan commitments included in other liabilities	202	55	190
Leases Financing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Charge-offs
Recoveries	1	1
Provisions	(1)	(1)
Consumer: Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	196	195	195
Charge-offs
Provisions		(7)
Ending balance	196	188	196
Ending balance: collectively evaluated for impairment	196		196
Ending balance: Loans receivables	61,919		62,560
Ending Balance: individually evaluated for impairment	607		544
Ending Balance: collectively evaluated for impairment	61,312		62,016
Reserve for unfunded loan commitments included in other liabilities	17	13	16
Consumer: Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	61	64	64
Charge-offs	(10)
Provisions	12	3
Ending balance	63	67	61
Ending balance: individually evaluated for impairment	5		5
Ending balance: collectively evaluated for impairment	58		56
Ending balance: Loans receivables	6,055		5,972
Ending Balance: individually evaluated for impairment	254		256
Ending Balance: collectively evaluated for impairment	5,801		5,716
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	558	527	527
Charge-offs
Provisions	(76)	81
Ending balance	482	$ 608	558
Ending balance: collectively evaluated for impairment	$ 482		$ 558