Condensed Parent Company Only Financial Statements - Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Interest income	$ 27,532	$ 27,100	$ 27,871	$ 26,972	$ 26,047	$ 25,186	$ 24,207	$ 22,042	$ 109,475	$ 107,052	$ 97,482
Interest expense	3,586	3,951	4,344	4,908	7,054	6,632	6,139	4,875	16,789	26,916	24,700
Net interest income	23,946	23,149	23,527	22,064	18,993	18,554	18,068	17,167	92,686	80,136	72,782
Bargain purchase gain										123
Income tax expense	3,529	3,096	3,153	2,747	1,854	1,725	1,802	1,666	12,525	6,887	7,047
NET INCOME (LOSS)	$ 13,688	$ 11,458	$ 12,048	$ 9,986	$ 7,556	$ 7,094	$ 7,454	$ 6,800	47,180	27,545	28,904
Parent Company
Interest income									13	27	25
Interest expense									534	899	1,079
Net interest income									(521)	(872)	(1,054)
Dividends from Bank									12,000	34,000	23,000
Bargain purchase gain										123
Operating expenses									599	1,529	827
Income before income taxes and equity in undistributed income of the Bank									10,880	31,722	21,119
Income tax expense									235	292	358
Income before equity in undistributed income of the Bank									11,115	32,014	21,477
Equity in undistributed income of the Bank									36,065	(4,469)	7,427
NET INCOME (LOSS)									47,180	27,545	28,904
COMPREHENSIVE INCOME									$ 45,615	$ 30,745	$ 32,496