Loans Receivable and Allowance for Loan Losses, Summary of Impaired loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Interest income recognized [Abstract]
Real estate acquired through foreclosure	$ 1,601		$ 1,537
Residential Mortgage [Member]
Unpaid principal balance [Abstract]
With no related allowance	6,689		7,054
With a related allowance	5,849		5,888
Total	12,538		12,942
Recorded investment [Abstract]
With no related allowance	6,528		6,808
With a related allowance	5,731		5,771
Total	12,259		12,579
Related allowance	905		927
Average recorded investment [Abstract]
With no related allowance	6,668	$ 10,765
With a related allowance	5,751	7,064
Total	12,419	17,829
Interest income recognized [Abstract]
With no related allowance	69	110
With a related allowance	81	58
Total	150	168
Commercial [Member]
Unpaid principal balance [Abstract]
With a related allowance			476
Total			476
Recorded investment [Abstract]
With a related allowance			430
Total			430
Related allowance			430
Average recorded investment [Abstract]
With no related allowance		148
With a related allowance	215
Total	215	148
Interest income recognized [Abstract]
With no related allowance		13
Total		13
Commercial Real Estate [Member]
Unpaid principal balance [Abstract]
With no related allowance	1,241		1,244
With a related allowance	738		795
Total	1,979		2,039
Recorded investment [Abstract]
With no related allowance	1,203		1,206
With a related allowance	731		786
Total	1,934		1,992
Related allowance	91		142
Average recorded investment [Abstract]
With no related allowance	1,204	1,328
With a related allowance	758	1,541
Total	1,962	2,869
Interest income recognized [Abstract]
With no related allowance	17	10
With a related allowance	8	19
Total	25	29
ADC [Member]
Unpaid principal balance [Abstract]
With no related allowance	972		1,142
With a related allowance	134		135
Total	1,106		1,277
Recorded investment [Abstract]
With no related allowance	972		1,143
With a related allowance	134		135
Total	1,106		1,278
Related allowance	32		32
Average recorded investment [Abstract]
With no related allowance	1,058	634
With a related allowance	134	351
Total	1,192	985
Interest income recognized [Abstract]
With no related allowance	7	8
With a related allowance	2	4
Total	9	12
Home Equity/2nds [Member]
Unpaid principal balance [Abstract]
With no related allowance	1,283		1,290
With a related allowance	13		13
Total	1,296		1,303
Recorded investment [Abstract]
With no related allowance	847		859
With a related allowance	12		12
Total	859		871
Related allowance	2		2
Average recorded investment [Abstract]
With no related allowance	853	623
With a related allowance	12	7
Total	865	630
Interest income recognized [Abstract]
With no related allowance	13	4
Total	13	4
Consumer [Member]
Unpaid principal balance [Abstract]
With no related allowance	74		76
Total	74		76
Recorded investment [Abstract]
With no related allowance	74		76
Total	74		$ 76
Average recorded investment [Abstract]
With no related allowance	35
With a related allowance	40	83
Total	75	83
Interest income recognized [Abstract]
With no related allowance	1
With a related allowance		1
Total	1	$ 1
Residential Properties [Member]
Interest income recognized [Abstract]
Residential mortgage loans secured by residential real estate properties in formal foreclosure proceedings	$ 1,900