Loans Receivable and Allowance for Loan Losses, Changes in Allowance for Loan Losses and Recorded Investment(Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Allowance for Loan losses [Roll Forward]
Beginning Balance	$ 7,718	$ 8,804	$ 8,969	$ 8,758
Charge-offs	0	(72)	(805)	(446)
Recoveries	218	203	422	523
Net (charge-offs) recoveries	218	131	(383)	77
Provision for (reversal of) loan losses	0	50	(650)	150
Ending Balance	7,936	8,985	7,936	8,985
Ending balance - individually evaluated for impairment					$ 1,782	$ 2,373	$ 2,259
Ending balance - collectively evaluated for impairment					6,154	6,596	6,726
Ending balance	7,936	8,804	7,936	8,758	7,936	8,969	8,985
Ending loan balance - individually evaluated for impairment					24,888	30,298	33,777
Ending loan balance - collectively evaluated for impairment					626,076	579,980	578,681
Ending loan balance					650,964	610,278	612,458
Residential Mortgage [Member]
Allowance for Loan losses [Roll Forward]
Beginning Balance	3,403	3,892	3,833	4,188
Charge-offs	0	0	(707)	(151)
Recoveries	156	137	295	322
Net (charge-offs) recoveries	156	137	(412)	171
Provision for (reversal of) loan losses	(137)	(161)	1	(491)
Ending Balance	3,422	3,868	3,422	3,868
Ending balance - individually evaluated for impairment					1,544	1,703	1,583
Ending balance - collectively evaluated for impairment					1,878	2,130	2,285
Ending balance	3,403	3,892	3,833	4,188	3,422	3,833	3,868
Ending loan balance - individually evaluated for impairment					20,379	20,403	22,521
Ending loan balance - collectively evaluated for impairment					268,790	237,256	246,375
Ending loan balance					289,169	257,659	268,896
Commercial [Member]
Allowance for Loan losses [Roll Forward]
Beginning Balance	389	752	478	291
Charge-offs	0	0	0	(17)
Recoveries	0	10	0	43
Net (charge-offs) recoveries	0	10	0	26
Provision for (reversal of) loan losses	53	(63)	(36)	382
Ending Balance	442	699	442	699
Ending balance - individually evaluated for impairment					0	15	15
Ending balance - collectively evaluated for impairment					442	463	684
Ending balance	389	752	478	291	442	478	699
Ending loan balance - individually evaluated for impairment					0	148	495
Ending loan balance - collectively evaluated for impairment					37,485	46,320	41,864
Ending loan balance					37,485	46,468	42,359
Commercial Real Estate [Member]
Allowance for Loan losses [Roll Forward]
Beginning Balance	2,571	2,577	2,535	2,792
Charge-offs	0	0	0	(178)
Recoveries	40	4	100	4
Net (charge-offs) recoveries	40	4	100	(174)
Provision for (reversal of) loan losses	(44)	(189)	(68)	(226)
Ending Balance	2,567	2,392	2,567	2,392
Ending balance - individually evaluated for impairment					186	196	200
Ending balance - collectively evaluated for impairment					2,381	2,339	2,192
Ending balance	2,571	2,577	2,535	2,792	2,567	2,535	2,392
Ending loan balance - individually evaluated for impairment					3,419	5,656	5,696
Ending loan balance - collectively evaluated for impairment					219,748	190,054	193,219
Ending loan balance					223,167	195,710	198,915
ADC [Member]
Allowance for Loan losses [Roll Forward]
Beginning Balance	984	983	1,390	956
Charge-offs	0	(72)	0	(72)
Recoveries	0	0	0	100
Net (charge-offs) recoveries	0	(72)	0	28
Provision for (reversal of) loan losses	158	289	(248)	216
Ending Balance	1,142	1,200	1,142	1,200
Ending balance - individually evaluated for impairment					50	53	55
Ending balance - collectively evaluated for impairment					1,092	1,337	1,145
Ending balance	984	983	1,390	956	1,142	1,390	1,200
Ending loan balance - individually evaluated for impairment					1,003	858	1,446
Ending loan balance - collectively evaluated for impairment					83,161	89,244	79,894
Ending loan balance					84,164	90,102	81,340
Home Equity/2nds[Member]
Allowance for Loan losses [Roll Forward]
Beginning Balance	367	593	728	528
Charge-offs	0	0	(98)	(28)
Recoveries	22	2	27	4
Net (charge-offs) recoveries	22	2	(71)	(24)
Provision for (reversal of) loan losses	(28)	226	(296)	317
Ending Balance	361	821	361	821
Ending balance - individually evaluated for impairment					0	402	402
Ending balance - collectively evaluated for impairment					361	326	419
Ending balance	367	593	728	528	361	728	821
Ending loan balance - individually evaluated for impairment					0	3,137	3,519
Ending loan balance - collectively evaluated for impairment					15,861	15,992	16,220
Ending loan balance					15,861	19,129	19,739
Consumer [Member]
Allowance for Loan losses [Roll Forward]
Beginning Balance	4	7	5	3
Charge-offs	0	0	0	0
Recoveries	0	50	0	50
Net (charge-offs) recoveries	0	50	0	50
Provision for (reversal of) loan losses	(2)	(52)	(3)	(48)
Ending Balance	2	5	2	5
Ending balance - individually evaluated for impairment					2	4	4
Ending balance - collectively evaluated for impairment					0	1	1
Ending balance	$ 4	$ 7	$ 5	$ 3	2	5	5
Ending loan balance - individually evaluated for impairment					87	96	100
Ending loan balance - collectively evaluated for impairment					1,031	1,114	1,109
Ending loan balance					$ 1,118	$ 1,210	$ 1,209