Loans and Allowance for Credit Losses on Loans - Delinquent and Nonaccrual Loans by Past Due Status (Details) - USD ($) $ in Thousands		Dec. 31, 2024	Jun. 30, 2024
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans	[1],[2]	$ 1,551,400	$ 1,499,473
Loans on non-accrual		4,055	3,728
Commercial Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		112,908	111,307
Loans on non-accrual		148	0
Residential Real Estate [Member] | Residential Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		418,968	417,589
Loans on non-accrual		2,937	2,518
Real Estate [Member] | Commercial Real Estate Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		983,072	936,640
Loans on non-accrual		936	1,163
Home Equity [Member] | Consumer Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		31,780	29,166
Loans on non-accrual		34	47
Consumer [Member] | Consumer Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		4,672	4,771
Loans on non-accrual		0	0
30 to 59 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		2,483	61
30 to 59 Days Past Due [Member] | Commercial Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		32	0
30 to 59 Days Past Due [Member] | Residential Real Estate [Member] | Residential Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		2,289	0
30 to 59 Days Past Due [Member] | Real Estate [Member] | Commercial Real Estate Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		110	0
30 to 59 Days Past Due [Member] | Home Equity [Member] | Consumer Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		51	14
30 to 59 Days Past Due [Member] | Consumer [Member] | Consumer Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		1	47
60 to 89 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		1,077	844
60 to 89 Days Past Due [Member] | Commercial Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		68	0
60 to 89 Days Past Due [Member] | Residential Real Estate [Member] | Residential Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		983	838
60 to 89 Days Past Due [Member] | Real Estate [Member] | Commercial Real Estate Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		0	0
60 to 89 Days Past Due [Member] | Home Equity [Member] | Consumer Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		0	0
60 to 89 Days Past Due [Member] | Consumer [Member] | Consumer Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		26	6
90 Days or More Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		2,759	2,267
90 Days or More Past Due [Member] | Commercial Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		148	0
90 Days or More Past Due [Member] | Residential Real Estate [Member] | Residential Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		1,920	1,414
90 Days or More Past Due [Member] | Real Estate [Member] | Commercial Real Estate Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		658	806
90 Days or More Past Due [Member] | Home Equity [Member] | Consumer Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		33	47
90 Days or More Past Due [Member] | Consumer [Member] | Consumer Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		0	0
Total Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		6,319	3,172
Total Past Due [Member] | Commercial Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		248	0
Total Past Due [Member] | Residential Real Estate [Member] | Residential Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		5,192	2,252
Total Past Due [Member] | Real Estate [Member] | Commercial Real Estate Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		768	806
Total Past Due [Member] | Home Equity [Member] | Consumer Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		84	61
Total Past Due [Member] | Consumer [Member] | Consumer Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		27	53
Current [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		1,545,081	1,496,301
Current [Member] | Commercial Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		112,660	111,307
Current [Member] | Residential Real Estate [Member] | Residential Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		413,776	415,337
Current [Member] | Real Estate [Member] | Commercial Real Estate Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		982,304	935,834
Current [Member] | Home Equity [Member] | Consumer Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		31,696	29,105
Current [Member] | Consumer [Member] | Consumer Portfolio [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Line Items]
Total loans		$ 4,645	$ 4,718

[1] Loan balances exclude accrued interest receivable of $6.9 million and $6.2 million at December 31, 2024 and June 30, 2024, respectively, which is included in accrued interest receivable in the consolidated statement of financial condition.

[2] Loan balances include net deferred fees/costs of ($188,000) and ($42,000) at December 31, 2024 and June 30, 2024, respectively.