CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (UNAUDITED)  (Parenthetical) - USD ($)	Mar. 31, 2024	Sep. 30, 2023
Allowance for credit losses on loans	$ 201,577,000	$ 177,207,000
Goodwill	$ 411,401,000	$ 304,750,000
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	300,000	300,000
Preferred stock, shares outstanding (in shares)	300,000	300,000
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares issued (in shares)	153,834,612	136,466,579
Common stock, shares outstanding (in shares)	81,405,391	64,736,916
Treasury stock, shares (in shares)	72,429,221	71,729,663
Senior Debt
Face amount	$ 95,000,000
Stated interest rate	6.50%