Loans Receivable, Allowance For Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Summary of allowance for loan losses [Abstract]
Beginning Balance	$ 8,804	$ 8,944	$ 8,758	$ 9,435	$ 9,435
Provision	50	0	150	200	(280)
Charge-offs	(72)	(484)	(446)	(1,357)	(1,522)
Recoveries	203	229	523	411	1,125
Ending Balance	8,985	8,689	8,985	8,689	8,758
Ending balance related to [Abstract]
Allowance on loans individually evaluated for impairment	2,259	2,290	2,259	2,290	2,282
Allowance on loans collectively evaluated for impairment	6,726	6,399	$ 6,726	6,399	6,476
Past due period after which accrual of interest on loans is discontinued			90 days
Residential Mortgage [Member]
Summary of allowance for loan losses [Abstract]
Beginning Balance	3,892	4,396	$ 4,188	4,664	4,664
Provision	(161)	(267)	(491)	(311)	(651)
Charge-offs	0	(32)	(151)	(383)	(454)
Recoveries	137	81	322	208	629
Ending Balance	3,868	4,178	3,868	4,178	4,188
Ending balance related to [Abstract]
Allowance on loans individually evaluated for impairment	1,583	1,883	1,583	1,883	1,838
Allowance on loans collectively evaluated for impairment	2,285	2,295	2,285	2,295	2,350
Construction Acquisition and Development [Member]
Summary of allowance for loan losses [Abstract]
Beginning Balance	297	422	446	362	362
Provision	113	(120)	(133)	(60)	84
Charge-offs	(13)	0	(13)	0	0
Recoveries	0	0	97	0	0
Ending Balance	397	302	397	302	446
Ending balance related to [Abstract]
Allowance on loans individually evaluated for impairment	0	1	0	1	0
Allowance on loans collectively evaluated for impairment	397	301	397	301	446
Land [Member]
Summary of allowance for loan losses [Abstract]
Beginning Balance	686	458	510	646	646
Provision	176	(28)	349	(216)	(185)
Charge-offs	(59)	0	(59)	0	0
Recoveries	0	0	3	0	49
Ending Balance	803	430	803	430	510
Ending balance related to [Abstract]
Allowance on loans individually evaluated for impairment	55	42	55	42	78
Allowance on loans collectively evaluated for impairment	748	388	748	388	432
Lines of Credit [Member]
Summary of allowance for loan losses [Abstract]
Beginning Balance	49	21	57	12	12
Provision	(9)	(14)	(27)	(30)	(190)
Charge-offs	0	0	0	0	0
Recoveries	0	15	10	40	235
Ending Balance	40	22	40	22	57
Ending balance related to [Abstract]
Allowance on loans individually evaluated for impairment	15	0	15	0	30
Allowance on loans collectively evaluated for impairment	25	22	25	22	27
Commercial Real Estate [Member]
Summary of allowance for loan losses [Abstract]
Beginning Balance	2,577	2,732	2,792	2,504	2,504
Provision	(189)	84	(226)	362	368
Charge-offs	0	0	(178)	(50)	(80)
Recoveries	4	0	4	0	0
Ending Balance	2,392	2,816	2,392	2,816	2,792
Ending balance related to [Abstract]
Allowance on loans individually evaluated for impairment	200	322	200	322	328
Allowance on loans collectively evaluated for impairment	2,192	2,494	2,192	2,494	2,464
Commercial Non-Real Estate [Member]
Summary of allowance for loan losses [Abstract]
Beginning Balance	703	394	234	280	280
Provision	(54)	135	409	223	59
Charge-offs	0	(154)	(17)	(155)	(154)
Recoveries	10	2	33	29	49
Ending Balance	659	377	659	377	234
Ending balance related to [Abstract]
Allowance on loans individually evaluated for impairment	0	6	0	6	5
Allowance on loans collectively evaluated for impairment	659	371	659	371	229
Home Equity [Member]
Summary of allowance for loan losses [Abstract]
Beginning Balance	593	518	528	963	963
Provision	226	210	317	233	236
Charge-offs	0	(298)	(28)	(769)	(834)
Recoveries	2	131	4	134	163
Ending Balance	821	561	821	561	528
Ending balance related to [Abstract]
Allowance on loans individually evaluated for impairment	402	34	402	34	2
Allowance on loans collectively evaluated for impairment	419	527	419	527	526
Consumer [Member]
Summary of allowance for loan losses [Abstract]
Beginning Balance	7	3	3	4	4
Provision	(52)	0	(48)	(1)	(1)
Charge-offs	0	0	0	0	0
Recoveries	50	0	50	0	0
Ending Balance	5	3	5	3	3
Ending balance related to [Abstract]
Allowance on loans individually evaluated for impairment	4	2	4	2	1
Allowance on loans collectively evaluated for impairment	$ 1	$ 1	$ 1	$ 1	$ 2