Company: BOKF
Filing Date: 2025-02-19
Form Type: 10-K
Source: 0000875357-25-000013
Chunk: 44

Company: BOK FINANCIAL CORP
Filing Date: 2025-02-19
Form: 10-K
Item: Item 8
Chunk 44
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 as shown in the following table (dollars in thousands): Less thanOne YearOne toFive YearsSix toTen YearsOverTen YearsTotalWeightedAverageMaturity1Fixed maturity debt securities: Amortized cost$236,710 $2,469,580 $544,215 $427,988 $3,678,493 4.99 Fair value234,816 2,290,038 493,883 412,265 3,431,002 Residential mortgage-backed securities:     Amortized cost2    $9,710,442 Fair value    9,420,598 Total available for sale securities:      Amortized cost    $13,388,935  Fair value    12,851,600  1Expected maturities may differ from contractual maturities, because borrowers may have the right to call or prepay obligations with or without penalty.2The average expected lives of residential mortgage-backed securities were 4.4 years based upon current prepayment assumptions.

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Sales of available for sale securities resulted in gains and losses as follows (in thousands):Year Ended December 31, 202420232022Proceeds$839,352 $834,704 $307,481 Gross realized gains2,257 1,180 5,054 Gross realized losses(48,085)(31,816)(6,025)Related federal and state income tax expense (benefit)(10,779)(7,206)(227)The fair value of debt securities pledged as collateral for repurchase agreements, public trust funds on deposit and for other purposes, as required by law was $9.9 billion at December 31, 2024 and $13.9 billion at December 31, 2023. The secured parties do not have the right to sell or repledge these securities. Temporarily Impaired Available for Sale Securities(Dollars in thousands)December 31, 2024 Number of SecuritiesLess Than 12 Months12 Months or LongerTotalFairValueUnrealizedLossFairValueUnrealizedLossFairValueUnrealizedLossAvailable for sale:       U.S. Treasury1 $— $— $945 $55 $945 $55 Municipal securities113 1,041 13 222,432 14,949 223,473 14,962 Mortgage