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Investment Securities - Mortgage Backed Securities Policy (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2022
Dec. 31, 2021
Jun. 30, 2022
Schedule of Available-for-sale Securities [Line Items]          
Unrealized Holding Losses Total, Unrealized Losses $ 19,869   $ 19,869   $ 14,110
Unrealized Holding Losses Less Than 12 Months, Unrealized Losses 737   737   9,183
Unrealized Holding Losses 12 Months or More, Unrealized Losses 19,131   19,131   4,927
U.S. government sponsored enterprise MBS          
Schedule of Available-for-sale Securities [Line Items]          
Principal payments from investment securities available for sale 7,600 $ 15,500 16,900 $ 32,500  
Proceeds from sale of investment securities available for sale 0 0 0 0  
Payments to acquire Mortgage Backed Securities (MBS) categorized as Held-to-maturity   $ 15,000   $ 15,000  
Unrealized Holding Losses 12 Months or More, Unrealized Losses $ 19,131   $ 19,131   $ 4,927