Earnings Per Share - Schedule of computation of basic and diluted earnings per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share
Net income	$ 12,048	$ 7,717	$ 22,033	$ 15,545
Less: distributed earnings allocated to participating securities	(4)		(8)
Less: undistributed earnings allocated to participating securities	(30)		(56)
Net income available to common shareholders	$ 12,014	$ 7,717	$ 21,969	$ 15,545
Weighted-average common shares outstanding, including participating securities	9,089,735	9,232,257	9,108,301	9,232,257
Less: weighted-average participating securities outstanding (restricted shares)	(25,410)		(26,335)
Weighted-average basic common shares outstanding	9,064,325	9,232,257	9,081,966	9,232,257
Effect of dilutive securities, stock options, and awards	2,909		2,220
Denominator for diluted earnings per share	9,067,234	9,232,257	9,084,186	9,232,257
Basic earnings per common share	$ 1.33	$ 0.84	$ 2.42	$ 1.69
Diluted earnings per common share	$ 1.32	$ 0.84	$ 2.42	$ 1.68