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Borrowings - Junior Subordinated Debentures (Details) - USD ($)
$ in Millions
9 Months Ended
Feb. 21, 2007
Mar. 31, 2023
Feb. 12, 2023
Quantum      
Debt Instrument [Line Items]      
Business acquisition, percentage of voting interests acquired     100.00%
Junior Subordinated Debt      
Debt Instrument [Line Items]      
Debt instrument, face amount $ 11.3    
Debt instrument, basis spread on variable rate   1.94%  
Debt instrument, interest rate, effective percentage   7.13%  
Quantum      
Debt Instrument [Line Items]      
Trust preferred securities $ 11.0