Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Basic earnings per share:
Net income	$ 3,449	$ 6,785	$ 10,388	$ 19,950
Less: income allocated to unvested restricted stock	(8)	(8)	(25)	(8)
Net income allocated to common stock	$ 3,441	$ 6,777	$ 10,363	$ 19,942
Weighted-average total common shares outstanding (in shares)	15,378,374	15,835,139	15,432,353	15,949,962
Weighted average unvested restricted stock (in shares)	(34,486)	(18,870)	(36,878)	(6,359)
Weighted-average common shares outstanding (in shares)	15,343,888	15,816,269	15,395,475	15,943,603
Basic earnings per share (in dollars per share)	$ 0.22	$ 0.43	$ 0.67	$ 1.25
Diluted earnings per share:
Net income allocated to common stock	$ 3,441	$ 6,777	$ 10,363	$ 19,942
Weighted-average common shares outstanding (in shares)	15,343,888	15,816,269	15,395,475	15,943,603
Diluted effect of stock options (in shares)	33,643	283,329	70,732	288,245
Diluted weighted-average common shares outstanding (in shares)	15,377,531	16,099,598	15,466,207	16,231,848
Diluted earnings per share (in shares)	$ 0.22	$ 0.42	$ 0.67	$ 1.23
Antidilutive securities earnings per share, amount	660,859	155,000	163,000	163,000