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Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Basic earnings per common share
Net income	$ 6,084	$ 4,293	$ 3,323	$ 3,278	$ 5,768	$ 5,085	$ 6,572	$ 5,899	$ 16,978	$ 23,324
less: earnings allocated to participating securities									423	502
Basic earnings allocated to common shareholders									$ 16,555	$ 22,822
Weighted-average common shares outstanding, excluding participating securities									8,384,464	8,515,375
Basic earnings per common share	$ 0.71	$ 0.50	$ 0.38	$ 0.38	$ 0.67	$ 0.59	$ 0.75	$ 0.67	$ 1.97	$ 2.68
Diluted earnings per common share
Diluted earnings allocated to common shareholders									$ 16,555	$ 22,822
Weighted-average diluted common shares outstanding, excluding participating securities									8,384,464	8,515,375
Diluted earnings per common share	$ 0.71	$ 0.50	$ 0.38	$ 0.38	$ 0.67	$ 0.59	$ 0.75	$ 0.67	$ 1.97	$ 2.68

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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