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Fair Value Accounting - Carrying And Estimated Fair Values Of Financial Instruments Carried On Balance Sheet (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Financial assets |  |
Investment securities held to maturity | $ 2,668,068 | $ 0
Investment securities available for sale | 7,043,681 | 9,788,662
Loans held for sale | 139,323 | 52,768
Financial liabilities |  |
Non-interest-bearing deposits | 11,655,811 | 12,507,616
Total deposits | 50,195,778 | 50,739,185
Federal funds purchased and securities sold under repurchase agreements | 94,484 | 189,074
Long-term debt | 2,283,767 | 1,932,534
Level 1 |  |
Financial assets |  |
Total cash, cash equivalents, and restricted cash | 2,294,608 | 2,451,426
Trading securities | 0 | 0
Investment securities held to maturity | 0 |
Investment securities available for sale | 1,174,295 | 597,629
Loans held for sale | 0 | 0
Other investments | 0 | 0
Mutual funds and mutual funds held in rabbi trusts | 60,356 | 53,742
Loans, net | 0 | 0
FRB and FHLB stock | 0 | 0
Derivative assets | 0 | 0
Financial liabilities |  |
Non-interest-bearing deposits | 0 | 0
Non-time interest-bearing deposits | 0 | 0
Time deposits | 0 | 0
Total deposits | 0 | 0
Federal funds purchased and securities sold under repurchase agreements | 94,484 | 189,074
Securities sold short | 2,536 | 3,496
Long-term debt | 0 | 0
Mutual funds held in rabbi trusts | 45,479 | 38,735
Derivative liabilities | 0 | 0
Level 2 |  |
Financial assets |  |
Total cash, cash equivalents, and restricted cash | 0 | 0
Trading securities | 13,052 | 12,898
Investment securities held to maturity | 2,638,071 |
Investment securities available for sale | 5,869,386 | 9,191,033
Loans held for sale | 41,823 | 47,338
Other investments | 0 | 0
Mutual funds and mutual funds held in rabbi trusts | 0 | 0
Loans, net | 0 | 0
FRB and FHLB stock | 213,711 | 184,944
Derivative assets | 97,078 | 94,903
Financial liabilities |  |
Non-interest-bearing deposits | 11,655,811 | 12,507,616
Non-time interest-bearing deposits | 27,278,278 | 27,449,088
Time deposits | 11,235,622 | 10,769,002
Total deposits | 50,169,711 | 50,725,706
Federal funds purchased and securities sold under repurchase agreements | 0 | 0
Securities sold short | 0 | 0
Long-term debt | 2,302,474 | 1,939,604
Mutual funds held in rabbi trusts | 0 | 0
Derivative liabilities | 280,045 | 259,650
Level 3 |  |
Financial assets |  |
Total cash, cash equivalents, and restricted cash | 0 | 0
Trading securities | 0 | 0
Investment securities held to maturity | 0 |
Investment securities available for sale | 0 | 0
Loans held for sale | 97,056 | 5,432
Other investments | 14,423 | 12,560
Mutual funds and mutual funds held in rabbi trusts | 0 | 0
Loans, net | 41,112,625 | 41,298,149
FRB and FHLB stock | 0 | 0
Derivative assets | 0 | 0
Financial liabilities |  |
Non-interest-bearing deposits | 0 | 0
Non-time interest-bearing deposits | 0 | 0
Time deposits | 0 | 0
Total deposits | 0 | 0
Federal funds purchased and securities sold under repurchase agreements | 0 | 0
Securities sold short | 0 | 0
Long-term debt | 0 | 0
Mutual funds held in rabbi trusts | 0 | 0
Derivative liabilities | 0 | 0
Carrying Value |  |
Financial assets |  |
Total cash, cash equivalents, and restricted cash | 2,294,608 | 2,451,426
Trading securities | 13,052 | 12,898
Investment securities held to maturity | 2,668,068 |
Investment securities available for sale | 7,043,681 | 9,788,662
Loans held for sale |  | 52,768
Other investments | 14,423 | 12,560
Mutual funds and mutual funds held in rabbi trusts | 60,356 | 53,742
Loans, net | 42,608,296 | 42,925,105
FRB and FHLB stock | 213,711 | 184,944
Derivative assets | 97,078 | 94,903
Financial liabilities |  |
Non-interest-bearing deposits | 11,655,811 | 12,507,616
Non-time interest-bearing deposits | 27,278,278 | 27,449,088
Time deposits | 11,261,689 | 10,782,481
Total deposits | 50,195,778 | 50,739,185
Federal funds purchased and securities sold under repurchase agreements | 94,484 | 189,074
Securities sold short | 2,536 | 3,496
Long-term debt | 2,283,767 | 1,932,534
Mutual funds held in rabbi trusts | 45,479 | 38,735
Derivative liabilities | 280,045 | 259,650
Fair Value |  |
Financial assets |  |
Total cash, cash equivalents, and restricted cash | 2,294,608 | 2,451,426
Trading securities | 13,052 | 12,898
Investment securities held to maturity | 2,638,071 |
Investment securities available for sale | 7,043,681 | 9,788,662
Loans held for sale | 138,879 | 52,770
Other investments | 14,423 | 12,560
Mutual funds and mutual funds held in rabbi trusts | 60,356 | 53,742
Loans, net | 41,112,625 | 41,298,149
FRB and FHLB stock | 213,711 | 184,944
Derivative assets | 97,078 | 94,903
Financial liabilities |  |
Non-interest-bearing deposits | 11,655,811 | 12,507,616
Non-time interest-bearing deposits | 27,278,278 | 27,449,088
Time deposits | 11,235,622 | 10,769,002
Total deposits | 50,169,711 | 50,725,706
Federal funds purchased and securities sold under repurchase agreements | 94,484 | 189,074
Securities sold short | 2,536 | 3,496
Long-term debt | 2,302,474 | 1,939,604
Mutual funds held in rabbi trusts | 45,479 | 38,735
Derivative liabilities | $ 280,045 | $ 259,650

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