Earnings Per Share (Computaton of Basic and Diluted EPS) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Computation of Basic and Diluted Shares
Net income	$ 2,541	$ 1,117	$ 1,861	$ 392	$ 5,413	$ 5,368	$ 7,992	$ 7,978	$ 5,911	$ 26,751	$ 19,989
Weighted average shares outstanding – basic (in shares)									8,408,017	8,365,360	8,147,742
Dilutive potential shares from unvested restricted shares (in shares)									55,222	182,010	252,280
Weighted average shares outstanding – diluted (in shares)									8,463,239	8,547,370	8,400,022
Earnings per share:
Basic (in dollars per share)	$ 0.30	$ 0.13	$ 0.22	$ 0.05	$ 0.65	$ 0.64	$ 0.95	$ 0.96	$ 0.70	$ 3.20	$ 2.45
Diluted (in dollars per share)	$ 0.30	$ 0.13	$ 0.22	$ 0.05	$ 0.64	$ 0.62	$ 0.94	$ 0.93	$ 0.70	$ 3.13	$ 2.38