v3.25.2
Benefit Plans - Schedule of Net Benefit Costs (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]      
Service cost $ 71 $ 77 $ 281
Interest cost $ 360 $ 369 $ 369
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax
Expected return on assets $ 625 $ (92) $ (99)
Amortization of net loss (106) (58) (24)
Net periodic benefit cost 950 296 527
Atlas Bank Retirement Income Plan ("ABRIP")      
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]      
Interest cost 82 81 78
Expected return on assets (90) (93) (99)
Amortization of net loss 33 42 28
Net periodic benefit cost $ 25 $ 30 $ 7
Discount rate 5.50% 5.00% 4.50%
Long term rate of return on plan assets 3.50% 3.50% 3.50%
Benefit Equalization Plan ("BEP")      
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]      
Interest cost $ 117 $ 115 $ 111
Amortization of net loss 38 42 46
Net periodic benefit cost $ 155 $ 157 $ 157
Discount rate 5.50% 5.00% 4.50%
Postretirement Welfare Plan      
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]      
Service cost $ 71 $ 79 $ 95
Interest cost 57 50 48
Amortization of net loss (48) (42) (28)
Net periodic benefit cost $ 80 $ 87 $ 115
Discount rate 5.50% 5.00% 4.50%
Salary increase rate 3.25% 3.25% 3.25%
Directors' Consultation and Retirement Plan ("DCRP")      
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]      
Interest cost $ 130 $ 124 $ 117
Amortization of net loss (128) (99) (69)
Net periodic benefit cost $ 2 $ 25 $ 48
Discount rate 5.50% 5.00% 4.50%
Supplemental Executive Retirement Plan (SERP)      
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]      
Service cost $ 0 $ 0  
Interest cost 0 0  
Net periodic benefit cost $ 0 $ 0  
Discount rate 0.00% 0.00%  
Salary increase rate 0.00% 0.00%