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SECURITIES - Schedule of Available for Sale Securities Pledged (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Jun. 30, 2024
Schedule of Available for Sale Securities [Line Items]    
Investment securities available for sale $ 1,070,811 $ 1,072,833
Asset Pledged as Collateral    
Schedule of Available for Sale Securities [Line Items]    
Investment securities available for sale 972,759 671,181
Asset Pledged as Collateral | Pledged to secure public funds on deposit    
Schedule of Available for Sale Securities [Line Items]    
Investment securities available for sale 99,919 100,238
Asset Pledged as Collateral | Pledged for potential borrowings at the Federal Reserve Bank of New York    
Schedule of Available for Sale Securities [Line Items]    
Investment securities available for sale 781,017 482,044
Asset Pledged as Collateral | Pledged for the bank term funding program    
Schedule of Available for Sale Securities [Line Items]    
Investment securities available for sale $ 91,823 $ 88,899