Loans and Allowance for Credit Losses - Classes of loans (Details) $ in Thousands	12 Months Ended
	Jun. 30, 2025 USD ($) loan	Jun. 30, 2024 USD ($) loan	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans (before deferred loan fees, net)	$ 4,100,768	$ 3,850,035
Deferred loan fees, net	(178)	(232)
Allowance for credit losses	(51,629)	(52,516)	$ (47,820)	$ (33,192)
Net loans	$ 4,048,961	$ 3,797,287
Number of purchased participation loans | loan	71	71
Purchased participation loans	$ 188,000	$ 178,500
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans (before deferred loan fees, net)	510,259	450,147
Allowance for credit losses	(6,952)	(6,233)	(5,235)	(3,597)
Agriculture production
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans (before deferred loan fees, net)	206,128	175,968
Allowance for credit losses	(3,374)	(835)	(782)	(799)
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans (before deferred loan fees, net)	55,387	59,671
Allowance for credit losses	(952)	(578)	(490)	(402)
All other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans (before deferred loan fees, net)	5,102	3,981
Allowance for credit losses	(4)	(17)	(21)	(14)
Secured by real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans (before deferred loan fees, net)	3,323,892	3,160,268
Secured by real estate | 1-4 residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans (before deferred loan fees, net)	992,445	925,397
Allowance for credit losses	(10,274)	(10,528)	(9,474)	(7,266)
Secured by real estate | Commercial Real Estate | Non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans (before deferred loan fees, net)	888,317	899,770
Allowance for credit losses	(12,241)	(19,055)	(13,863)	(11,101)
Secured by real estate | Commercial Real Estate | Owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans (before deferred loan fees, net)	442,984	427,476
Allowance for credit losses	(4,521)	(4,815)	(5,168)	(2,555)
Secured by real estate | Multi-family real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans (before deferred loan fees, net)	422,758	384,564
Allowance for credit losses	(4,329)	(5,447)	(6,806)	(2,057)
Secured by real estate | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans (before deferred loan fees, net)	332,405	290,541
Allowance for credit losses	(4,788)	(2,901)	(3,414)	(3,256)
Secured by real estate | Agriculture real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans (before deferred loan fees, net)	244,983	232,520
Allowance for credit losses	$ (4,194)	$ (2,107)	$ (2,567)	$ (2,145)