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Earnings per share - Schedule of Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings per share
Net income, Basic	$ 7,579	$ 9,630
Average common shares outstanding - Basic	7,157,553	7,172,455
Earnings per share - Basic	$ 1.06	$ 1.34
Net income, Diluted	$ 7,579	$ 9,630
Average common shares outstanding - Diluted	7,198,970	7,216,421
Earnings per share - Diluted	$ 1.05	$ 1.33

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