Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Summary of computation of basic and diluted earnings per share [Abstract]
Common shares outstanding at the beginning of the period (shares)			9,351,694	9,336,441
Weighted average number of net shares (redeemed) issued (shares)	46,232	30,816
Weighted average shares outstanding (basic) (shares)	9,397,926	9,367,257
Weighted average of potential dilutive shares attributable to stock options granted, computed under the treasury stock method (shares)	3,754	4,008
Weighted average number of shares (diluted) (shares)	9,401,680	9,371,265
Net income (In thousands)	$ 7,075	$ 11,203
Earnings per share:
Basic (in dollars per share)	$ 0.75	$ 1.20
Diluted (in dollars per share)	$ 0.75	$ 1.20