Loans Receivable, Non-Performing Assets and Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	$ 15,292	$ 16,166
Impaired Loans with Specific Allowance, Related Allowance	2,373	2,282
Impaired Loans with No Specific Allowance, Recorded Investment	15,006	20,875
Total Impaired Loans, Recorded Investment	30,298	37,041
Total Impaired Loans, Unpaid Principal Balance	31,737	38,840
Impaired Loans with Specific Allowance, Average Recorded Investment	14,226	17,100
Impaired Loans with Specific Allowance, Interest Income Recognized	606	710
Impaired Loans with No Specific Allowance, Average Recorded Investment	20,053	20,938
Impaired Loans with No Related Allowance, Interest Income Recognized	821	980
Total Impaired Loans, Average Recorded Investment	34,279	38,038
Total Impaired Loans Interest Income Recognized	1,427	1,690
Loans in nonaccrual status included in impaired loans	20,446
Impaired loans	30,298	37,041
Total loans	628,950	622,234
Pass [Member]
Impaired loans [Abstract]
Total loans	604,912	580,276
Residential Mortgage [Member]
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	11,065	11,885
Impaired Loans with Specific Allowance, Related Allowance	1,703	1,838
Impaired Loans with No Specific Allowance, Recorded Investment	9,338	14,202
Total Impaired Loans, Recorded Investment	20,403	26,087
Total Impaired Loans, Unpaid Principal Balance	21,030	26,656
Impaired Loans with Specific Allowance, Average Recorded Investment	10,785	12,645
Impaired Loans with Specific Allowance, Interest Income Recognized	463	540
Impaired Loans with No Specific Allowance, Average Recorded Investment	12,747	13,886
Impaired Loans with No Related Allowance, Interest Income Recognized	521	564
Total Impaired Loans, Average Recorded Investment	23,532	26,531
Total Impaired Loans Interest Income Recognized	984	1,104
Impaired loans	20,403	26,087
Total loans	260,603	285,930
Residential Mortgage [Member] | Pass [Member]
Impaired loans [Abstract]
Total loans	251,763	268,583
Construction Acquisition and Development [Member]
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	0	0
Impaired Loans with Specific Allowance, Related Allowance	0	0
Impaired Loans with No Specific Allowance, Recorded Investment	0	309
Total Impaired Loans, Recorded Investment	0	309
Total Impaired Loans, Unpaid Principal Balance	0	309
Impaired Loans with Specific Allowance, Average Recorded Investment	0	114
Impaired Loans with Specific Allowance, Interest Income Recognized	0	1
Impaired Loans with No Specific Allowance, Average Recorded Investment	208	573
Impaired Loans with No Related Allowance, Interest Income Recognized	9	29
Total Impaired Loans, Average Recorded Investment	208	687
Total Impaired Loans Interest Income Recognized	9	30
Impaired loans	0	309
Total loans	57,166	77,478
Construction Acquisition and Development [Member] | Pass [Member]
Impaired loans [Abstract]
Total loans	57,166	77,168
Land [Member]
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	417	639
Impaired Loans with Specific Allowance, Related Allowance	53	78
Impaired Loans with No Specific Allowance, Recorded Investment	441	969
Total Impaired Loans, Recorded Investment	858	1,608
Total Impaired Loans, Unpaid Principal Balance	858	1,723
Impaired Loans with Specific Allowance, Average Recorded Investment	489	822
Impaired Loans with Specific Allowance, Interest Income Recognized	26	21
Impaired Loans with No Specific Allowance, Average Recorded Investment	1,026	1,035
Impaired Loans with No Related Allowance, Interest Income Recognized	27	72
Total Impaired Loans, Average Recorded Investment	1,515	1,857
Total Impaired Loans Interest Income Recognized	53	93
Impaired loans	858	1,608
Total loans	48,664	28,677
Land [Member] | Pass [Member]
Impaired loans [Abstract]
Total loans	47,886	26,845
Lines of Credit [Member]
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	148	299
Impaired Loans with Specific Allowance, Related Allowance	15	30
Impaired Loans with No Specific Allowance, Recorded Investment	0	0
Total Impaired Loans, Recorded Investment	148	299
Total Impaired Loans, Unpaid Principal Balance	148	299
Impaired Loans with Specific Allowance, Average Recorded Investment	149	25
Impaired Loans with Specific Allowance, Interest Income Recognized	7	1
Impaired Loans with No Specific Allowance, Average Recorded Investment	141	321
Impaired Loans with No Related Allowance, Interest Income Recognized	2	18
Total Impaired Loans, Average Recorded Investment	290	346
Total Impaired Loans Interest Income Recognized	9	19
Impaired loans	148	299
Total loans	29,657	20,188
Lines of Credit [Member] | Pass [Member]
Impaired loans [Abstract]
Total loans	29,289	19,521
Commercial Real Estate [Member]
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	1,958	3,214
Impaired Loans with Specific Allowance, Related Allowance	196	328
Impaired Loans with No Specific Allowance, Recorded Investment	3,698	3,107
Total Impaired Loans, Recorded Investment	5,656	6,321
Total Impaired Loans, Unpaid Principal Balance	5,858	6,469
Impaired Loans with Specific Allowance, Average Recorded Investment	2,020	2,933
Impaired Loans with Specific Allowance, Interest Income Recognized	100	134
Impaired Loans with No Specific Allowance, Average Recorded Investment	4,021	2,179
Impaired Loans with No Related Allowance, Interest Income Recognized	187	166
Total Impaired Loans, Average Recorded Investment	6,041	5,112
Total Impaired Loans Interest Income Recognized	287	300
Impaired loans	5,656	6,321
Total loans	195,710	174,912
Commercial Real Estate [Member] | Pass [Member]
Impaired loans [Abstract]
Total loans	184,820	155,766
Commercial Non-Real Estate [Member]
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	0	103
Impaired Loans with Specific Allowance, Related Allowance	0	5
Impaired Loans with No Specific Allowance, Recorded Investment	0	19
Total Impaired Loans, Recorded Investment	0	122
Total Impaired Loans, Unpaid Principal Balance	0	123
Impaired Loans with Specific Allowance, Average Recorded Investment	25	213
Impaired Loans with Specific Allowance, Interest Income Recognized	1	5
Impaired Loans with No Specific Allowance, Average Recorded Investment	4	10
Impaired Loans with No Related Allowance, Interest Income Recognized	0	13
Total Impaired Loans, Average Recorded Investment	29	223
Total Impaired Loans Interest Income Recognized	1	18
Impaired loans	0	122
Total loans	16,811	9,296
Commercial Non-Real Estate [Member] | Pass [Member]
Impaired loans [Abstract]
Total loans	16,722	9,151
Home Equity [Member]
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	1,608	16
Impaired Loans with Specific Allowance, Related Allowance	402	2
Impaired Loans with No Specific Allowance, Recorded Investment	1,529	2,269
Total Impaired Loans, Recorded Investment	3,137	2,285
Total Impaired Loans, Unpaid Principal Balance	3,747	3,251
Impaired Loans with Specific Allowance, Average Recorded Investment	679	337
Impaired Loans with Specific Allowance, Interest Income Recognized	7	8
Impaired Loans with No Specific Allowance, Average Recorded Investment	1,889	2,520
Impaired Loans with No Related Allowance, Interest Income Recognized	75	115
Total Impaired Loans, Average Recorded Investment	2,568	2,857
Total Impaired Loans Interest Income Recognized	82	123
Impaired loans	3,137	2,285
Total loans	19,129	24,529
Home Equity [Member] | Pass [Member]
Impaired loans [Abstract]
Total loans	16,056	22,018
Consumer [Member]
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	96	10
Impaired Loans with Specific Allowance, Related Allowance	4	1
Impaired Loans with No Specific Allowance, Recorded Investment	0	0
Total Impaired Loans, Recorded Investment	96	10
Total Impaired Loans, Unpaid Principal Balance	96	10
Impaired Loans with Specific Allowance, Average Recorded Investment	79	11
Impaired Loans with Specific Allowance, Interest Income Recognized	2	0
Impaired Loans with No Specific Allowance, Average Recorded Investment	17	414
Impaired Loans with No Related Allowance, Interest Income Recognized	0	3
Total Impaired Loans, Average Recorded Investment	96	425
Total Impaired Loans Interest Income Recognized	2	3
Impaired loans	96	10
Total loans	1,210	1,224
Consumer [Member] | Pass [Member]
Impaired loans [Abstract]
Total loans	1,210	1,224
Residential Real Estate [Member]
Impaired loans [Abstract]
Total Impaired Loans, Recorded Investment	20,403
Impaired loans	20,403
Unfunded [Member]
Impaired loans [Abstract]
Total loans	15,728	21,101
Unfunded [Member] | Pass [Member]
Impaired loans [Abstract]
Total loans	15,728	$ 21,101
Consumer Residential Real Estate [Member]
Impaired loans [Abstract]
Total Impaired Loans, Recorded Investment	17,075
Impaired loans	17,075
Builders Residential Real Estate [Member]
Impaired loans [Abstract]
Total Impaired Loans, Recorded Investment	3,328
Impaired loans	$ 3,328