Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Numerator:
Net income	$ 1,926	$ 1,773	$ 4,975	$ 5,052
Denominator:
Basic weighted average common shares outstanding (in shares)	10,324,048	10,631,508	10,447,231	10,731,555
Dilutive restricted stock grants (in shares)	72,640	70,753	48,884	72,876
Diluted weighted average common shares outstanding (in shares)	10,396,688	10,702,261	10,496,115	10,804,431
Basic earnings per share (in dollars per share)	$ 0.19	$ 0.17	$ 0.48	$ 0.47
Diluted earnings per share (in dollars per share)	$ 0.19	$ 0.17	$ 0.47	$ 0.47
Unallocated shares (in shares)	860,224	913,113	860,224	913,113	899,892
Antidilutive securities excluded from computation of earnings per share (in shares)	916	2,718	916	2,718