NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS (Dollars in millions, except share and per share data) As of June 30, 2023 and December 31, 2022, the Company has amortized costs of $7,227.8 million and $4,998.9 million, respectively, for investment securities pledged to secure public deposits and securities sold under repurchase agreements that had estimated fair values of $6,455.1 million and $4,432.0 million, as of June 30, 2023 and December 31, 2022, respectively. All securities sold under repurchas ...