XML 51 R40.htm IDEA: XBRL DOCUMENT v3.24.0.1
SECURITIES - Narrative (Details)
 3 Months Ended
Dec. 31, 2023
USD ($)
security
Dec. 31, 2022
USD ($)
Sep. 30, 2023
USD ($)
Debt Securities, Available-for-sale [Line Items]      
AFS number of securities in an unrealized loss position (in securities) | security 199    
Federal reserve bank stock $ 19,700,000   $ 19,700,000
Federal home loan bank stock 4,000,000   8,500,000
Impairment recognized 0 $ 0  
Marketable      
Debt Securities, Available-for-sale [Line Items]      
Equity securities 4,200,000   3,400,000
Unrealized losses on equity securities 100,000 0  
Non-marketable      
Debt Securities, Available-for-sale [Line Items]      
Equity securities 9,700,000   8,400,000
Unrealized losses on equity securities 300,000    
Unrealized gains on equity securities 2,500,000 $ 100,000  
Equity securities without readily determinable fair value, amount $ 14,900,000   $ 16,200,000
Number of equity securities sold | security 1