Derivative Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2025

Derivative Financial Instruments

Schedule of derivative financial instruments

				March 31, 2025						December 31, 2024
	Balance Sheet	Notional		Estimated Fair Value				Notional		Estimated Fair Value
(Dollars in thousands)	Location	Amount		Gain		Loss		Amount		Gain		Loss
Fair value hedge of interest rate risk:
Pay fixed rate swap with counterparty	Other Assets	$	3,898	$	79	$	—	$	3,945	$	107	$	—
Not designated hedges of interest rate risk:
Customer related interest rate contracts:
Matched interest rate swaps with borrowers	Other Assets and Other Liabilities		12,986,187		90,936		698,392		12,649,905		36,232		878,046
Matched interest rate swaps with counterparty (1)	Other Assets		12,880,321		84,154		—		12,559,707		124,032		—
Economic hedges of interest rate risk:
Pay floating rate swap with counterparty	Other Assets		3,586,000		(14)		—		3,083,000		36		—
Not designated hedges of interest rate risk – mortgage banking activities:
Contracts used to hedge mortgage servicing rights	Other Assets and Other Liabilities		157,000		129		—		129,000		—		1,809
Contracts used to hedge mortgage pipeline	Other Assets and Other Liabilities		135,000		1,978		541		88,000		1,083		—
Total derivatives		$	29,748,406	$	177,262	$	698,933	$	28,513,557	$	161,490	$	879,855

Schedule of derivative, offsetting assets and liabilities

			March 31, 2025						December 31, 2024
	Notional		Estimated Fair Value				Notional		Estimated Fair Value
(Dollars in thousands)	Amount		Gain		Loss		Amount		Gain		Loss
Interest rate contracts subject to master netting agreements included in table above
Total gross derivative instruments, before netting	$	1,899,249	$	100,639	$	3,094	$	1,858,693	$	133,304	$	708
Less: Netting adjustment		172,329		(3,094)		(3,094)		49,000		(708)		(708)
Total gross derivative instruments, after netting		1,899,249	$	97,545	$	—		1,858,693	$	132,596	$	—

* As of March 31, 2025 and December 31, 2024, counterparties provided $43.9 million and $53.9 million, respectively, of cash collateral to the Company to secure swap asset positions that were not centrally cleared, which is included in Interest-bearing Deposits within Total Liabilities on the Consolidated Balance Sheets. Counterparties also pledged $30.0 million and $30.4 million in investment securities to secure swap asset positions that were not centrally cleared. The Company provided $1.9 million to counterparties to secure swap positions that were not centrally cleared as of March 31, 2025 and December 31, 2024.

Schedule of notional value of forward sale commitments and the fair value of those obligations along with the fair value of the mortgage pipeline

(Dollars in thousands)	March 31, 2025		December 31, 2024
Mortgage loan pipeline	$	112,826	$	59,291
Expected closures		97,758		53,177
Fair value of mortgage loan pipeline commitments		1,978		751
Forward sales commitments		135,000		88,000
Fair value of forward commitments		(541)		333