Earnings Per Share - Schedule of computation of basic and diluted earnings per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share
Net Income	$ 11,985	$ 12,048	$ 24,731	$ 22,033
Less: distributed earnings allocated to participating securities	(8)	(4)	(14)	(8)
Less: undistributed earnings allocated to participating securities	46	30	85	56
Net income available to common shareholders	$ 11,931	$ 12,014	$ 24,632	$ 21,969
Weighted-average common shares outstanding, including participating securities	8,887,303	9,089,735	8,893,149	9,108,301
Less: weighted-average participating securities outstanding (restricted shares)	(39,920)	(25,410)	(35,883)	(26,335)
Weighted-average shares outstanding	8,847,383	9,064,325	8,857,266	9,081,966
Effect of dilutive securities stock options or awards	21,780	2,909	15,977	2,220
Denominator for diluted earnings per share	8,869,163	9,067,234	8,873,243	9,084,186
Basic earnings per share available to common stockholders	$ 1.35	$ 1.33	$ 2.78	$ 2.42
Basic earnings per share available to common stockholders	$ 1.35	$ 1.32	$ 2.78	$ 2.42