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Fair Value Measurement (Schedule Of Carrying Value And Fair Value Of Financial Instruments Not Recorded At Fair Value) (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | --- | --- | --- | --- | ---
Financial assets: |  |  |  |  |  |
Equity and other investment securities | $ 77,221 |  | $ 76,995 |  |  |
Investment securities available for sale | 8,503,000 |  | 8,829,870 |  |  |
Investment securities held to maturity | 2,203 |  | 2,300 |  |  |
Loans held for sale | 56,310 |  | 30,715 |  |  |
Loans and leases, net | 37,291,316 |  | 37,001,080 |  |  |
Restricted equity securities | 116,274 |  | 179,274 |  |  |
Residential mortgage servicing rights | 110,039 | $ 110,444 | 109,243 | $ 172,929 | $ 178,800 | $ 185,017
Bank-owned life insurance | 686,485 |  | 680,948 |  |  |
Derivatives | 118,288 |  | 38,085 |  |  |
Financial liabilities: |  |  |  |  |  |
Securities sold under agreements to repurchase | 197,860 |  | 252,119 |  |  |
Borrowings | 3,900,000 |  | 3,950,000 |  |  |
Junior subordinated debentures, at fair value | 310,187 |  | 316,440 |  |  |
Junior and other subordinated debentures, at amortized cost | 107,781 |  | 107,895 |  |  |
Derivatives | 312,542 |  | 261,091 |  |  |
Carrying Value |  |  |  |  |  |
Financial assets: |  |  |  |  |  |
Cash and cash equivalents | 2,068,831 |  | 2,162,534 |  |  |
Equity and other investment securities | 77,221 |  | 76,995 |  |  |
Investment securities available for sale | 8,503,000 |  | 8,829,870 |  |  |
Investment securities held to maturity | 2,203 |  | 2,300 |  |  |
Loans held for sale | 56,310 |  | 30,715 |  |  |
Loans and leases, net | 37,291,316 |  | 37,001,080 |  |  |
Restricted equity securities | 116,274 |  | 179,274 |  |  |
Residential mortgage servicing rights | 110,039 |  | 109,243 |  |  |
Bank-owned life insurance | 686,485 |  | 680,948 |  |  |
Derivatives | 118,288 |  | 38,085 |  |  |
Financial liabilities: |  |  |  |  |  |
Demand, money market, and savings deposits | 35,113,311 |  | 35,379,451 |  |  |
Time Deposits | 6,409,961 |  | 6,227,569 |  |  |
Securities sold under agreements to repurchase | 197,860 |  | 252,119 |  |  |
Borrowings | 3,900,000 |  | 3,950,000 |  |  |
Junior subordinated debentures, at fair value | 310,187 |  | 316,440 |  |  |
Junior and other subordinated debentures, at amortized cost | 107,781 |  | 107,895 |  |  |
Derivatives | 312,542 |  | 261,091 |  |  |
Fair Value |  |  |  |  |  |
Financial assets: |  |  |  |  |  |
Cash and cash equivalents | 2,068,831 |  | 2,162,534 |  |  |
Equity and other investment securities | 77,221 |  | 76,995 |  |  |
Investment securities available for sale | 8,503,000 |  | 8,829,870 |  |  |
Investment securities held to maturity | 2,885 |  | 3,025 |  |  |
Loans held for sale | 56,310 |  | 30,715 |  |  |
Loans and leases, net | 35,831,050 |  | 35,810,989 |  |  |
Restricted equity securities | 116,274 |  | 179,274 |  |  |
Residential mortgage servicing rights | 110,039 |  | 109,243 |  |  |
Bank-owned life insurance | 686,485 |  | 680,948 |  |  |
Derivatives | 118,288 |  | 38,085 |  |  |
Financial liabilities: |  |  |  |  |  |
Demand, money market, and savings deposits | 35,113,311 |  | 35,379,451 |  |  |
Time Deposits | 6,384,569 |  | 6,201,519 |  |  |
Securities sold under agreements to repurchase | 197,860 |  | 252,119 |  |  |
Borrowings | 3,892,965 |  | 3,950,037 |  |  |
Junior subordinated debentures, at fair value | 310,187 |  | 316,440 |  |  |
Junior and other subordinated debentures, at amortized cost | 97,551 |  | 97,695 |  |  |
Derivatives | $ 312,542 |  | $ 261,091 |  |  |

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