Derivative Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2026

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Notional Amounts and Estimated Fair Values of Interest Rate Derivative Contracts Outstanding

The notional amounts and estimated fair values of interest rate derivative contracts outstanding are presented in the following table. The fair values of these contracts are estimated utilizing internal valuation methods with observable market data inputs, or as determined by the Chicago Mercantile Exchange (“CME”) for centrally cleared derivative contracts. CME rules legally characterize variation margin payments for centrally cleared derivatives as settlements of the derivatives' exposure rather than collateral. As a result, the variation margin payment and the related derivative instruments are considered a single unit of account for accounting and financial reporting purposes. Variation margin, as determined by the CME, is settled daily. As a result, derivative contracts that clear through the CME have a negligible fair value.

	March 31, 2026				December 31, 2025
	Notional Amount		Estimated Fair Value		Notional Amount		Estimated Fair Value
Derivatives designated as hedges of fair value:
Financial institution counterparties:
Securities interest rate swap - assets	$	500,000	$	198	$	—	$	—
Non-hedging interest rate derivatives:
Financial institution counterparties:
Loan/lease interest rate swaps – assets	1,185,210		35,575		783,022		34,835
Loan/lease interest rate swaps – liabilities	1,067,240		(13,819)		1,341,227		(20,598)
Loan/lease interest rate caps – assets	249,789		3,370		251,075		3,230
Customer counterparties:
Loan/lease interest rate swaps – assets	1,067,240		13,819		1,341,227		20,598
Loan/lease interest rate swaps – liabilities	1,185,210		(35,575)		783,022		(34,835)
Loan/lease interest rate caps – liabilities	249,789		(3,371)		251,075		(3,232)

Schedule of Weighted-Average Rates Paid and Received for Interest Rate Swaps Outstanding

The weighted-average rates paid and received for active interest rate swaps outstanding at March 31, 2026, were as follows:

	Weighted-Average
	Interest Rate Paid		Interest Rate Received
Interest rate swaps:
Non-hedging interest rate swaps – financial institution counterparties	5.15	%	5.40	%
Non-hedging interest rate swaps – customer counterparties	5.40		5.15

Schedule of Notional Amounts and Estimated Fair Values of Commodity Derivative Positions

The notional amounts and estimated fair values of non-hedging commodity derivative contracts outstanding are presented in the following table. The fair values of these contracts are estimated utilizing internal valuation methods with observable market data inputs.

		March 31, 2026			December 31, 2025
	Notional Units	Notional Amount	Estimated Fair Value		Notional Amount	Estimated Fair Value
Financial institution counterparties:
Oil – assets	Barrels	932	$	1,379	7,842	$	42,594
Oil – liabilities	Barrels	11,986	(131,899)		1,913	(968)
Natural gas – assets	MMBTUs	27,031	11,572		29,288	7,678
Natural gas – liabilities	MMBTUs	10,491	(710)		8,000	(938)
Customer counterparties:
Oil – assets	Barrels	11,986	133,675		1,928	1,091
Oil – liabilities	Barrels	932	(1,265)		7,828	(41,265)
Natural gas – assets	MMBTUs	10,921	790		8,000	1,001
Natural gas – liabilities	MMBTUs	26,601	(11,319)		29,288	(7,427)

Schedule of Amounts Related to Non-Hedging Interest Rate and Commodity Derivatives

For the fair value hedge of securities, all cash flows and changes in the fair value of the derivative hedging instrument, as well as SOFR-related changes in the fair value of the hedged layer of municipal securities, are recorded in interest income on tax-exempt securities. For non-hedging derivative instruments, gains and losses due to changes in fair value and all cash flows are included in other non-interest income and other non-interest expense, as presented in the table below.

	Three Months Ended March 31,
	2026		2025
Fair value hedge of municipal securities:
Interest income on tax-exempt securities (net ineffective portion of hedge)	$	28	$	—
Non-hedging interest rate derivatives:
Other non-interest income	1,532		389
Other non-interest expense	—		(1)
Non-hedging commodity derivatives:
Other non-interest income	1,132		1,766
Non-hedging foreign currency derivatives:
Other non-interest income	4		55