Loans Receivable and Allowance for Loan Losses, Summary of Loans Receivable (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Summary of loans receivable [Abstract]
Total loans receivable	$ 692,775	$ 671,161
Unearned loan fees	(3,063)	(3,010)
Net loans receivable	689,712	668,151	$ 650,964
Loans pledged as collateral	173,000
Federal National Mortgage Association [Member]
Summary of loans receivable [Abstract]
Mortgage loans serviced	30,100	33,500
Federal Home Loan Mortgage Corporation [Member]
Summary of loans receivable [Abstract]
Mortgage loans serviced	15,300	16,000
Residential Mortgage [Member]
Summary of loans receivable [Abstract]
Total loans receivable	287,258	287,656
Net loans receivable	$ 285,470	285,819	289,169
Loan to value ratio	80.00%
Commercial [Member]
Summary of loans receivable [Abstract]
Total loans receivable	$ 43,180	37,356
Net loans receivable	43,180	37,356	37,485
Commercial Real Estate [Member]
Summary of loans receivable [Abstract]
Total loans receivable	236,105	236,302
Net loans receivable	234,830	235,129	223,167
ADC [Member]
Summary of loans receivable [Abstract]
Total loans receivable	112,994	93,060
Net loans receivable	112,994	93,060	84,164
Home Equity/2nds [Member]
Summary of loans receivable [Abstract]
Total loans receivable	12,173	15,703
Net loans receivable	12,173	15,703	15,861
Consumer [Member]
Summary of loans receivable [Abstract]
Total loans receivable	1,065	1,084
Net loans receivable	$ 1,065	$ 1,084	$ 1,118