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Securities - Schedule of Available for Sale Securities Pledged (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Jun. 30, 2023
Schedule of Available-for-sale Securities [Line Items]    
Investment securities available for sale $ 1,072,833 $ 1,227,729
Asset Pledged as Collateral    
Schedule of Available-for-sale Securities [Line Items]    
Investment securities available for sale 671,181 730,455
Asset Pledged as Collateral | FHLB advances    
Schedule of Available-for-sale Securities [Line Items]    
Investment securities available for sale 0 0
Asset Pledged as Collateral | Pledged to secure public funds on deposit    
Schedule of Available-for-sale Securities [Line Items]    
Investment securities available for sale 100,238 201,239
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 482,044 529,216
Asset Pledged as Collateral | Federal Reserve Bank Term Funding Program ("BTFP")    
Schedule of Available-for-sale Securities [Line Items]    
Investment securities available for sale $ 88,899 $ 0