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Derivative Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Summary of Notion Amounts and Fair Values of Derivative Financial Instruments
The following table presents a summary of notional amounts and fair values of derivative financial instruments as of December 31:
20242023
Notional
Amount
Asset
(Liability)
Fair Value
Notional
Amount
Asset
(Liability)
Fair Value
(dollars in thousands)
Interest Rate Locks with Customers
Positive fair values$171,933 $389 $119,558 $460 
Negative fair values3,888 (58)1,015 (2)
Forward Commitments
Positive fair values51,250 363 — — 
Negative fair values  42,000 (854)
Interest Rate Derivatives with Customers(1)
Positive fair values767,905 8,480 824,659 22,656 
Negative fair values3,976,294 (239,058)3,784,236 (222,530)
Interest Rate Derivatives with Dealer Counterparties
Positive fair values3,976,294 150,480 3,784,236 128,235 
Negative fair values767,905 (10,734)824,659 (23,023)
Interest Rate Derivatives used in Cash Flow Hedges
Positive fair values2,500,000 227 2,500,000 6,189 
Negative fair values1,400,000 (2,971)750,000 — 
Foreign Exchange Contracts with Customers
Positive fair values28,327 1,619 4,159 40 
Negative fair values693 (27)13,353 (446)
Foreign Exchange Contracts with Correspondent Banks
Positive fair values4,059 63 15,969 532 
Negative fair values32,406 (1,569)6,112 (31)
(1) Fair values are net of a valuation allowance of $366.3 thousand as of December 31, 2024 and 2023, respectively.
Summary of Effect of Fair Value and Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income
The following table presents the effect of cash flow hedge accounting on AOCI:
Amount of Gain (Loss) Recognized in OCI on Derivative Amount of Gain (Loss) Recognized in OCI Included ComponentAmount of Gain (Loss) Recognized in OCI Excluded ComponentLocation of Gain (Loss) Recognized from AOCI into IncomeAmount of Gain (Loss) Reclassified from AOCI into Income Amount of Gain (Loss) Reclassified from AOCI into Income Included ComponentAmount of Gain (Loss) Reclassified from AOCI into Income Excluded Component
(dollars in thousands)
Year ended December 31, 2024
Interest Rate Products$(10,261)$(10,261)$ Interest Income$(29,899)$(29,899)$ 
Interest Rate Products11,025 11,025  Interest Expense6,446 6,446  
Total $764 $764 $ $(23,453)$(23,453)$ 
Year ended December 31, 2023
Interest Rate Products$19,598 $19,598 $— Interest Income$(27,546)$(27,546)$— 
Interest Rate Products(10,550)(10,550)— Interest Expense1,696 1,696 — 
Total$9,048 $9,048 $— $(25,850)$(25,850)$— 

The following table presents the effect of fair value and cash flow hedge accounting on the income statement for the year ended December 31:
Consolidated Statements of Income Classification
20242023
Interest IncomeInterest ExpenseInterest IncomeInterest Expense
(dollars in thousands)
Total amounts of income line items presented in the consolidated statements of income in which the effects of fair value or cash flow hedges are recorded$(29,899)$6,446 $(27,546)$1,696 
The effects of fair value and cash flow hedging:
Amount of gain or (loss) on cash flow hedging relationships  — — 
Interest contracts:
Amount of (loss) gain reclassified from AOCI into income(29,899)6,446 (27,546)1,696 
Amount of (loss) gain reclassified from AOCI into income as a result that a forecasted transaction is no longer probable of occurring  — — 
Amount of (loss) gain reclassified from AOCI into income - included component(29,899)6,446 (27,546)1,696 
Amount of (loss) gain reclassified from AOCI into income - excluded component  — — 
Summary of Fair Value Gains and Losses on Derivative Financial Instruments
The following table presents the fair value gains (losses) on derivative financial instruments for the years ended December 31:
 Consolidated Statements of Income Classification202420232022
 (dollars in thousands)
Mortgage banking derivatives(1)
Mortgage banking$1,090 $(380)$(2,360)
Interest rate derivativesOther income419 (1,855)— 
Foreign exchange contractsOther income(9)81 
Net fair value gains (losses) on derivative financial instruments$1,500 $(2,228)$(2,279)
(1) Includes interest rate locks with customers and forward commitments.
Summary of Mortgage Loans Held for Sale
The Corporation has elected to measure mortgage loans held for sale at fair value. The following table presents a summary of mortgage loans held for sale and the impact of the fair value election on the consolidated financial statements as of December 31:
20242023
 (dollars in thousands)
Amortized Cost (1)
$25,316 $14,792 
Fair value25,618 15,158 
(1) Cost basis of mortgage loans held for sale represents the unpaid principal balance.
Offsetting Assets and Liabilities The following table presents the Corporation's financial instruments that are eligible for offset, and the effects of offsetting, on the consolidated balance sheets as of December 31:
Gross AmountsGross Amounts Not Offset
Recognized on the Consolidated
on theBalance Sheets
ConsolidatedFinancialCashNet
Balance Sheets
Instruments(1)
Collateral(2)
Amount
(dollars in thousands)
2024
Interest rate derivative assets$159,187 $(12,739)$ $146,448 
Foreign exchange derivative assets with correspondent banks63 (63)  
Total $159,250 $(12,802)$ $146,448 
Interest rate derivative liabilities$252,763 $(9,995)$(94,339)$148,429 
Foreign exchange derivative liabilities with correspondent banks1,569 (63) 1,506 
Total$254,332 $(10,058)$(94,339)$149,935 
2023
Interest rate derivative assets$157,080 $(15,154)$— $141,926 
Foreign exchange derivative assets with correspondent banks532 (532)— — 
Total$157,612 $(15,686)$— $141,926 
Interest rate derivative liabilities$245,553 $(21,343)$(93,841)$130,369 
Foreign exchange derivative liabilities with correspondent banks31 (532)— (501)
Total$245,584 $(21,875)$(93,841)$129,868 

(1) For interest rate derivative assets, amounts represent any derivative liability fair values that could be offset in the event of counterparty or customer default.
For interest rate derivative liabilities, amounts represent any derivative asset fair values that could be offset in the event of counterparty or customer default.
(2) Amounts represent cash collateral received from the counterparty or posted by the Corporation on interest rate derivative transactions and foreign
exchange contracts with financial institution counterparties. Interest rate derivatives with customers are collateralized by the same collateral securing the
underlying loans to those borrowers. Cash and securities collateral amounts are included in the table only to the extent of the net derivative fair values.

Cash Flow Hedge Terminations

On October 10, 2024, the Corporation terminated interest rate derivatives designated as cash flow hedges with a combined notional amount of $250 million. As the hedged transaction continues to be probable, the unrealized losses will be recorded in AOCI and will be recognized as an increase to interest expense when the previously forecasted hedged items affect earnings in future periods. During the year ended December 31, 2024, $0.2 million of these unrealized losses were reclassified as an increase to interest expense on borrowings on the Consolidated Statements of Income.

In January 2023, the Corporation terminated interest rate derivatives designated as cash flow hedges with a combined notional amount of $1.0 billion. As the hedged transaction continues to be probable, the unrealized losses that have been recorded in AOCI are recognized as reduction to interest income, including fees, when the previously forecasted hedged item affects earnings in future periods. During the years ended December 31, 2024 and 2023, $27.9 million and $22.1 million, respectively, of these unrealized losses have been reclassified as a reduction of interest income on loans, including fees, on the consolidated statements of income.