Loans, Troubled Debt Restructuring (Details)	3 Months Ended
	Mar. 31, 2017 USD ($) Loan	Mar. 31, 2016 USD ($) Loan
Loan modifications classified as troubled debt restructurings [Abstract]
Number of Loans | Loan	2	3
Pre-Modification Recorded Balance	$ 32,000	$ 334,000
Post-Modification Recorded Balance	23,000	407,000
Troubled debt restructurings that subsequently defaulted within 12 months of the restructuring date	$ 1,236,000	$ 0
Commercial and industrial [Member]
Loan modifications classified as troubled debt restructurings [Abstract]
Number of Loans | Loan	0	0
Pre-Modification Recorded Balance	$ 0	$ 0
Post-Modification Recorded Balance	$ 0	$ 0
Commercial, secured by real estate [Member]
Loan modifications classified as troubled debt restructurings [Abstract]
Number of Loans | Loan	0	1
Pre-Modification Recorded Balance	$ 0	$ 299,000
Post-Modification Recorded Balance	$ 0	$ 372,000
Residential real estate [Member]
Loan modifications classified as troubled debt restructurings [Abstract]
Number of Loans | Loan	1	1
Pre-Modification Recorded Balance	$ 18,000	$ 18,000
Post-Modification Recorded Balance	$ 9,000	$ 18,000
Consumer [Member]
Loan modifications classified as troubled debt restructurings [Abstract]
Number of Loans | Loan	1	1
Pre-Modification Recorded Balance	$ 14,000	$ 17,000
Post-Modification Recorded Balance	$ 14,000	$ 17,000