Loans (Loan Receivable and Allowance Balances Disaggregated) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Loan receivables:
Ending balance: individually evaluated for impairment	$ 27,458		$ 36,880	$ 35,787
Ending balance: collectively evaluated for impairment	1,356,956		1,306,822	1,250,790
Total Loan Receivables	1,387,186		1,346,922	1,290,415
Allowance for loan losses:
Ending balance: individually evaluated for impairment	1,181		1,180	1,366
Ending balance: collectively evaluated for impairment	9,737		9,796	9,359
Total Allowance for loan losses	10,918	$ 10,846	10,976	10,725	$ 10,471	$ 10,515
PCI Loans [Member]
Loan receivables:
Total Loan Receivables	2,772		3,220	3,838
All Other Loans [Member]
Loan receivables:
Total Loan Receivables	1,384,414		1,343,702
Commercial Real Estate Portfolio Segment [Member]
Loan receivables:
Ending balance: individually evaluated for impairment	20,918		27,540	26,492
Ending balance: collectively evaluated for impairment	895,305		848,691	800,450
Total Loan Receivables	917,948		878,016	828,445
Allowance for loan losses:
Ending balance: individually evaluated for impairment	289		326	182
Ending balance: collectively evaluated for impairment	6,720		6,556	6,381
Total Allowance for loan losses	7,009	6,742	6,882	6,563	6,664	6,451
Commercial Real Estate Portfolio Segment [Member] | PCI Loans [Member]
Loan receivables:
Total Loan Receivables	1,725		1,785	1,503
Commercial Real Estate Portfolio Segment [Member] | All Other Loans [Member]
Loan receivables:
Total Loan Receivables	916,223		876,231
Residential First Mortgages Portfolio Segment [Member]
Loan receivables:
Ending balance: individually evaluated for impairment	2,123		2,527	2,434
Ending balance: collectively evaluated for impairment	154,096		153,716	160,186
Total Loan Receivables	156,670		156,709	163,090
Allowance for loan losses:
Ending balance: individually evaluated for impairment				0
Ending balance: collectively evaluated for impairment	709		755	737
Total Allowance for loan losses	709	722	755	737	937	1,144
Residential First Mortgages Portfolio Segment [Member] | PCI Loans [Member]
Loan receivables:
Total Loan Receivables	451		466	470
Residential First Mortgages Portfolio Segment [Member] | All Other Loans [Member]
Loan receivables:
Total Loan Receivables	156,219		156,243
Residential Rentals Portfolio Segment [Member]
Loan receivables:
Ending balance: individually evaluated for impairment	971		1,745	1,396
Ending balance: collectively evaluated for impairment	120,692		121,656	124,799
Total Loan Receivables	121,990		124,298	127,469
Allowance for loan losses:
Ending balance: collectively evaluated for impairment	458		498	469
Total Allowance for loan losses	458	462	498	469	459	512
Residential Rentals Portfolio Segment [Member] | PCI Loans [Member]
Loan receivables:
Total Loan Receivables	327		897	1,274
Residential Rentals Portfolio Segment [Member] | All Other Loans [Member]
Loan receivables:
Total Loan Receivables	121,663		123,401
Construction And Land Development Portfolio Segment [Member]
Loan receivables:
Ending balance: individually evaluated for impairment	0		729	729
Ending balance: collectively evaluated for impairment	35,662		28,976	27,646
Total Loan Receivables	35,662		29,705	28,647
Allowance for loan losses:
Ending balance: individually evaluated for impairment				210
Ending balance: collectively evaluated for impairment	246		310	288
Total Allowance for loan losses	246	148	310	498	482	462
Construction And Land Development Portfolio Segment [Member] | PCI Loans [Member]
Loan receivables:
Total Loan Receivables				272
Construction And Land Development Portfolio Segment [Member] | All Other Loans [Member]
Loan receivables:
Total Loan Receivables	35,662		29,705
Home Equity And Second Mortgage Loans [Member]
Loan receivables:
Ending balance: individually evaluated for impairment	471		288	299
Ending balance: collectively evaluated for impairment	35,126		35,201	36,408
Total Loan Receivables	35,866		35,561	37,026
Allowance for loan losses:
Ending balance: individually evaluated for impairment				7
Ending balance: collectively evaluated for impairment	131		133	97
Total Allowance for loan losses	131	132	133	104	118	162
Home Equity And Second Mortgage Loans [Member] | PCI Loans [Member]
Loan receivables:
Total Loan Receivables	269		72	319
Commercial Portfolio Segment [Member]
Loan receivables:
Ending balance: individually evaluated for impairment	2,626		2,751	2,792
Ending balance: collectively evaluated for impairment	64,991		68,929	54,727
Total Loan Receivables	67,617		71,680	57,519
Allowance for loan losses:
Ending balance: individually evaluated for impairment	700		700	458
Ending balance: collectively evaluated for impairment	702		782	745
Total Allowance for loan losses	1,402	1,406	1,482	1,203	1,045	1,013
Commercial Portfolio Segment [Member] | All Other Loans [Member]
Loan receivables:
Total Loan Receivables	67,617		71,680
Consumer Portfolio Segment [Member]
Loan receivables:
Ending balance: individually evaluated for impairment			1	2
Ending balance: collectively evaluated for impairment	967		750	799
Total Loan Receivables	967		751	801
Allowance for loan losses:
Ending balance: individually evaluated for impairment			1	1
Ending balance: collectively evaluated for impairment	9		5	6
Total Allowance for loan losses	9	8	6	7	7	7
Consumer Portfolio Segment [Member] | All Other Loans [Member]
Loan receivables:
Total Loan Receivables	967		751
Commercial Equipment Portfolio Segment [Member]
Loan receivables:
Ending balance: individually evaluated for impairment	349		1,299	1,643
Ending balance: collectively evaluated for impairment	50,117		48,903	45,775
Total Loan Receivables	50,466		50,202	47,418
Allowance for loan losses:
Ending balance: individually evaluated for impairment	192		153	508
Ending balance: collectively evaluated for impairment	762		757	636
Total Allowance for loan losses	954	$ 1,226	910	$ 1,144	$ 759	$ 764
Commercial Equipment Portfolio Segment [Member] | All Other Loans [Member]
Loan receivables:
Total Loan Receivables	$ 50,466		$ 50,202