v3.26.1
FINANCIAL DERIVATIVES - Schedule of Net Income/(Expense) Recognized (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Derivative Instruments, Gain (Loss) [Line Items]    
Interest Income Investments and Cash Equivalents $ 203,409 $ 209,650
Interest Income Loans 212,552 171,764
Total Interest Expense (314,565) (290,475)
Gains (losses) on financial derivatives 1,140 (2,636)
Designated as hedge    
Derivative Instruments, Gain (Loss) [Line Items]    
Interest Income Investments and Cash Equivalents 203,409 209,650
Interest Income Loans 212,552 171,764
Total Interest Expense (314,565) (290,475)
Gains (losses) on financial derivatives 1,140 (2,636)
Total 102,536 88,303
Designated as hedge | Fair value hedges:    
Derivative Instruments, Gain (Loss) [Line Items]    
Recognized on hedged items (10,664) (15,909)
Premium/discount amortization recognized on hedged items (88) (229)
(Losses)/gains on fair value hedging relationships, recognized on hedged items 15,893 86,547
(Losses)/gains on fair value hedging relationships 362 1,099
Designated as hedge | Fair value hedges: | Interest Income Investments and Cash Equivalents    
Derivative Instruments, Gain (Loss) [Line Items]    
Recognized on hedged items 75,184 69,001
Premium/discount amortization recognized on hedged items 609 431
(Losses)/gains on fair value hedging relationships, recognized on hedged items (29,888) 115,995
(Losses)/gains on fair value hedging relationships (416) (499)
Designated as hedge | Fair value hedges: | Interest Income Loans    
Derivative Instruments, Gain (Loss) [Line Items]    
Recognized on hedged items 24,882 18,968
Premium/discount amortization recognized on hedged items 0 0
(Losses)/gains on fair value hedging relationships, recognized on hedged items (2,133) 44,981
(Losses)/gains on fair value hedging relationships (49) 427
Designated as hedge | Fair value hedges: | Total Interest Expense    
Derivative Instruments, Gain (Loss) [Line Items]    
Recognized on hedged items (110,730) (103,878)
Premium/discount amortization recognized on hedged items (697) (660)
(Losses)/gains on fair value hedging relationships, recognized on hedged items 47,914 (74,429)
(Losses)/gains on fair value hedging relationships 827 1,171
Designated as hedge | Fair value hedges: | Gains/(losses) on financial derivatives    
Derivative Instruments, Gain (Loss) [Line Items]    
Recognized on hedged items 0 0
Premium/discount amortization recognized on hedged items 0 0
(Losses)/gains on fair value hedging relationships, recognized on hedged items 0 0
(Losses)/gains on fair value hedging relationships 0 0
Designated as hedge | Cash flow hedges:    
Derivative Instruments, Gain (Loss) [Line Items]    
Premium/discount amortization recognized on hedged items (25) 0
Interest settlements reclassified from AOCI into net income on derivatives 2,471 3,825
Recognized on hedged items (4,612) (6,345)
Expense recognized on cash flow hedges (2,166) (2,520)
Designated as hedge | Cash flow hedges: | Interest Income Investments and Cash Equivalents    
Derivative Instruments, Gain (Loss) [Line Items]    
Premium/discount amortization recognized on hedged items 0 0
Interest settlements reclassified from AOCI into net income on derivatives 0 0
Recognized on hedged items 0 0
Expense recognized on cash flow hedges 0 0
Designated as hedge | Cash flow hedges: | Interest Income Loans    
Derivative Instruments, Gain (Loss) [Line Items]    
Premium/discount amortization recognized on hedged items 0 0
Interest settlements reclassified from AOCI into net income on derivatives 0 0
Recognized on hedged items 0 0
Expense recognized on cash flow hedges 0 0
Designated as hedge | Cash flow hedges: | Total Interest Expense    
Derivative Instruments, Gain (Loss) [Line Items]    
Premium/discount amortization recognized on hedged items (25) 0
Interest settlements reclassified from AOCI into net income on derivatives 2,471 3,825
Recognized on hedged items (4,612) (6,345)
Expense recognized on cash flow hedges (2,166) (2,520)
Designated as hedge | Cash flow hedges: | Gains/(losses) on financial derivatives    
Derivative Instruments, Gain (Loss) [Line Items]    
Premium/discount amortization recognized on hedged items 0 0
Interest settlements reclassified from AOCI into net income on derivatives 0 0
Recognized on hedged items 0 0
Expense recognized on cash flow hedges 0 0
Designated as hedge | Interest Rate Swap | Fair value hedges:    
Derivative Instruments, Gain (Loss) [Line Items]    
Recognized on derivatives 19,990 13,036
Income/(expense) related to interest settlements on fair value hedging relationships 9,238 (3,102)
(Losses)/gains on fair value hedging relationships, recognized on derivatives (15,531) (85,448)
Designated as hedge | Interest Rate Swap | Fair value hedges: | Interest Income Investments and Cash Equivalents    
Derivative Instruments, Gain (Loss) [Line Items]    
Recognized on derivatives 16,566 29,144
Income/(expense) related to interest settlements on fair value hedging relationships 92,359 98,576
(Losses)/gains on fair value hedging relationships, recognized on derivatives 29,472 (116,494)
Designated as hedge | Interest Rate Swap | Fair value hedges: | Interest Income Loans    
Derivative Instruments, Gain (Loss) [Line Items]    
Recognized on derivatives 8,116 12,386
Income/(expense) related to interest settlements on fair value hedging relationships 32,998 31,354
(Losses)/gains on fair value hedging relationships, recognized on derivatives 2,084 (44,554)
Designated as hedge | Interest Rate Swap | Fair value hedges: | Total Interest Expense    
Derivative Instruments, Gain (Loss) [Line Items]    
Recognized on derivatives (4,692) (28,494)
Income/(expense) related to interest settlements on fair value hedging relationships (116,119) (133,032)
(Losses)/gains on fair value hedging relationships, recognized on derivatives (47,087) 75,600
Designated as hedge | Interest Rate Swap | Fair value hedges: | Gains/(losses) on financial derivatives    
Derivative Instruments, Gain (Loss) [Line Items]    
Recognized on derivatives 0 0
Income/(expense) related to interest settlements on fair value hedging relationships 0 0
(Losses)/gains on fair value hedging relationships, recognized on derivatives 0 0
No hedge designation    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) on financial derivatives 1,140 (2,636)
No hedge designation | Interest Income Investments and Cash Equivalents    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) on financial derivatives 0 0
No hedge designation | Interest Income Loans    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) on financial derivatives 0 0
No hedge designation | Total Interest Expense    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) on financial derivatives 0 0
No hedge designation | Gains/(losses) on financial derivatives    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) on financial derivatives 1,140 (2,636)
No hedge designation | Interest Rate Swap    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) on financial derivatives (961) (2,703)
Interest expense on interest rate swaps 969 318
No hedge designation | Interest Rate Swap | Interest Income Investments and Cash Equivalents    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) on financial derivatives 0 0
Interest expense on interest rate swaps 0 0
No hedge designation | Interest Rate Swap | Interest Income Loans    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) on financial derivatives 0 0
Interest expense on interest rate swaps 0 0
No hedge designation | Interest Rate Swap | Total Interest Expense    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) on financial derivatives 0 0
Interest expense on interest rate swaps 0 0
No hedge designation | Interest Rate Swap | Gains/(losses) on financial derivatives    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) on financial derivatives (961) (2,703)
Interest expense on interest rate swaps 969 318
No hedge designation | Treasury futures    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) on financial derivatives 1,132 (251)
No hedge designation | Treasury futures | Interest Income Investments and Cash Equivalents    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) on financial derivatives 0 0
No hedge designation | Treasury futures | Interest Income Loans    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) on financial derivatives 0 0
No hedge designation | Treasury futures | Total Interest Expense    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) on financial derivatives 0 0
No hedge designation | Treasury futures | Gains/(losses) on financial derivatives    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) on financial derivatives $ 1,132 $ (251)