XML 124 R80.htm IDEA: XBRL DOCUMENT v3.25.3
FAIR VALUE MEASUREMENTS - Fair Value by Balance Sheet Grouping (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Sep. 30, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities, at fair value $ 3,533,201 $ 2,572,709
Held-to-maturity securities 645,802 436,972
FHLB stock 88,068 95,617
Carrying Amount    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities, at fair value 3,533,201 2,572,709
Held-to-maturity securities 645,802 436,972
Carrying Amount | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents 657,310 2,381,102
Carrying Amount | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
FHLB stock 88,068 95,617
Time deposits 9,131,104 9,556,785
Borrowings 1,765,604 3,267,589
Carrying Amount | Level 2 | Client swap program hedges    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other assets 37,347 46,758
Other liabilities 37,818 47,388
Carrying Amount | Level 2 | Commercial loan fair value hedges    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other assets 1,611 1,595
Carrying Amount | Level 2 | Mortgage loan fair value hedges    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other assets 13,082 0
Other liabilities 20,426 667
Carrying Amount | Level 2 | Mortgage backed securities fair value hedges    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other liabilities 15,086 0
Carrying Amount | Level 2 | Borrowings cash flow hedges    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other assets 99,231 117,271
Carrying Amount | Level 2 | U.S. government and agency securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities, at fair value 235,919 314,204
Carrying Amount | Level 2 | Asset-backed securities due    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities, at fair value 506,334 540,125
Carrying Amount | Level 2 | Municipal bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities, at fair value 35,258 35,073
Carrying Amount | Level 2 | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities, at fair value 152,537 296,282
Carrying Amount | Level 2 | Agency pass-through certificates    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities, at fair value 2,603,153 1,387,025
Held-to-maturity securities 645,802 436,972
Carrying Amount | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans receivable 20,088,618 20,916,354
Junior subordinated deferrable interest debentures 51,645 50,718
Estimated Fair Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities, at fair value 3,533,201 2,572,709
Held-to-maturity securities 612,739 401,046
Estimated Fair Value | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents 657,310 2,381,102
Estimated Fair Value | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
FHLB stock 88,068 95,617
Time deposits 9,121,470 9,787,187
Borrowings 1,755,130 3,276,122
Estimated Fair Value | Level 2 | Client swap program hedges    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other assets 37,347 46,758
Other liabilities 37,818 47,388
Estimated Fair Value | Level 2 | Commercial loan fair value hedges    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other assets 1,611 1,595
Estimated Fair Value | Level 2 | Mortgage loan fair value hedges    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other assets 13,082 0
Other liabilities 20,426 667
Estimated Fair Value | Level 2 | Mortgage backed securities fair value hedges    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other liabilities 15,086 0
Estimated Fair Value | Level 2 | Borrowings cash flow hedges    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other assets 99,231 117,271
Estimated Fair Value | Level 2 | U.S. government and agency securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities, at fair value 235,919 314,204
Estimated Fair Value | Level 2 | Asset-backed securities due    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities, at fair value 506,334 540,125
Estimated Fair Value | Level 2 | Municipal bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities, at fair value 35,258 35,073
Estimated Fair Value | Level 2 | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities, at fair value 152,537 296,282
Estimated Fair Value | Level 2 | Agency pass-through certificates    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities, at fair value 2,603,153 1,387,025
Held-to-maturity securities 612,739 401,046
Estimated Fair Value | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans receivable 19,681,909 20,269,059
Junior subordinated deferrable interest debentures $ 50,925 $ 50,240