Quarterly Financial Data (Unaudited) - Summary of Quarterly Operating Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Quarterly Financial Data (Unaudited)
Interest income	$ 54,283	$ 48,286	$ 38,851	$ 34,996	$ 31,572	$ 28,339	$ 28,096	$ 28,860	$ 27,532	$ 27,100	$ 27,871	$ 26,972	$ 176,416	$ 116,867	$ 109,475
Interest expense	18,065	14,519	10,600	6,487	3,814	3,225	3,038	3,223	3,586	3,951	4,344	4,908	49,671	13,300	16,789
NET INTEREST INCOME	36,218	33,767	28,251	28,509	27,758	25,114	25,058	25,637	23,946	23,149	23,527	22,064	126,745	103,567	92,686
Provision (benefit) for credit / loan losses	795	10,072	1,138	5,056	240	1,552		(305)	(2,615)	(409)	1,000	1,000	17,061	1,487	(1,024)
Noninterest income	8,951	6,284	5,456	5,513	6,499	4,904	5,285	4,515	4,857	4,524	5,720	4,941	26,204	21,203	20,042
Noninterest expense	24,875	26,992	17,638	16,920	17,331	16,757	15,070	14,221	14,201	13,528	13,046	13,272	86,425	63,379	54,047
Income before income taxes	19,499	2,987	14,931	12,046	16,686	11,709	15,273	16,236	17,217	14,554	15,201	12,733	49,463	59,904	59,705
Income tax expense	3,939	578	3,267	2,442	3,602	2,358	3,288	3,487	3,529	3,096	3,153	2,747	10,226	12,735	12,525
NET INCOME	$ 15,560	$ 2,409	$ 11,664	$ 9,604	$ 13,084	$ 9,351	$ 11,985	$ 12,749	$ 13,688	$ 11,458	$ 12,048	$ 9,986	$ 39,237	$ 47,169	$ 47,180
Basic earnings per share	$ 1.37	$ 0.22	$ 1.26	$ 1.04	$ 1.41	$ 1.03	$ 1.35	$ 1.43	$ 1.53	$ 1.27	$ 1.33	$ 1.09	$ 3.86	$ 5.22	$ 5.22
Diluted earnings per share	$ 1.37	$ 0.22	$ 1.26	$ 1.04	$ 1.41	$ 1.03	$ 1.34	$ 1.43	$ 1.53	$ 1.27	$ 1.32	$ 1.09	$ 3.85	$ 5.21	$ 5.22