Loans and Allowance for Loan Losses (Details 3) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Analysis of changes in the allowance for loan losses
Balance at beginning of period	$ 4,198	$ 4,578
Loan charge-offs	(87)	(1,213)
Recoveries	54	19
Net loan recoveries (charge-offs)	(33)	(1,194)
Provision charged to operations	175	500
Balance at end of period	4,340	3,884
Commercial
Analysis of changes in the allowance for loan losses
Balance at beginning of period	1,232	1,591
Loan charge-offs		(1,163)
Recoveries	28
Net loan recoveries (charge-offs)	28	(1,163)
Provision charged to operations	318	906
Balance at end of period	1,578	1,334
Commercial real estate
Analysis of changes in the allowance for loan losses
Balance at beginning of period	2,414	2,702
Provision charged to operations	(213)	(412)
Balance at end of period	2,201	2,290
Residential real estate
Analysis of changes in the allowance for loan losses
Balance at beginning of period	314	117
Loan charge-offs	(29)
Net loan recoveries (charge-offs)	(29)
Provision charged to operations	35	(24)
Balance at end of period	320	93
Consumer | Home equity
Analysis of changes in the allowance for loan losses
Balance at beginning of period	115	70
Recoveries		3
Net loan recoveries (charge-offs)		3
Provision charged to operations	(1)	(6)
Balance at end of period	114	67
Consumer | Other
Analysis of changes in the allowance for loan losses
Balance at beginning of period	123	98
Loan charge-offs	(58)	(50)
Recoveries	26	16
Net loan recoveries (charge-offs)	(32)	(34)
Provision charged to operations	36	36
Balance at end of period	$ 127	$ 100