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Fair Value (Tables)

9 Months Ended

Sep. 30, 2025

Fair Value Disclosures [Abstract]

Financial Assets and Liabilities Measured at Fair Value Recurring Basis

The following tables summarize financial assets and financial liabilities measured at fair value on a recurring basis at September 30, 2025 and December 31, 2024, segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value ($ in thousands). There were no transfers between fair value levels for the nine months ended September 30, 2025 and the year ended December 31, 2024.

		September 30, 2025
		Total				Level 1				Level 2				Level 3
U.S. Treasury securities		$	208,269			$	208,269			$	—			$	—
U.S. Government agency obligations			70,535				—				70,535				—
Mortgage-backed securities			1,535,441				—				1,535,441				—
Securities available for sale			1,814,245				208,269				1,605,976				—
LHFS			228,141				—				228,141				—
MSR			131,676				—				—				131,676
Other assets - derivatives			18,899				1,300				16,259				1,340
Other liabilities - derivatives			21,081				78				21,003				—

		December 31, 2024
		Total				Level 1				Level 2				Level 3
U.S. Treasury securities		$	202,669			$	202,669			$	—			$	—
U.S. Government agency obligations			38,807				—				38,807				—
Mortgage-backed securities			1,451,058				—				1,451,058				—
Securities available for sale			1,692,534				202,669				1,489,865				—
LHFS			200,307				—				200,307				—
MSR			139,317				—				—				139,317
Other assets - derivatives			15,397				18				15,150				229
Other liabilities - derivatives			41,355				2,183				39,172				—

Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis

The changes in Level 3 assets measured at fair value on a recurring basis for the nine months ended September 30, 2025 and 2024 are summarized as follows ($ in thousands):

		MSR				Other Assets - Derivatives
Balance, January 1, 2025		$	139,317			$	229
Total net (loss) gain included in Mortgage banking, net (1)			(18,494	)			3,498
Additions			10,853				—
Sales			—				(2,387	)
Balance, September 30, 2025		$	131,676			$	1,340
The amount of total gains (losses) for the period included in earnings    that are attributable to the change in unrealized gains or    losses still held at September 30, 2025		$	(9,395	)		$	4,021
Balance, January 1, 2024		$	131,870			$	845
Total net (loss) gain included in Mortgage banking, net (1)			(15,436	)			2,154
Additions			9,419				—
Sales			—				(2,295	)
Balance, September 30, 2024		$	125,853			$	704
The amount of total gains (losses) for the period included in    earnings that are attributable to the change in unrealized    gains or losses still held at September 30, 2024		$	(6,908	)		$	1,580

(1)Total net (loss) gain included in Mortgage banking, net relating to the MSR includes changes in fair value due to market changes and due to run-off.

Carrying Amounts and Estimated Fair Values of Financial Instruments

The carrying amounts and estimated fair values of financial instruments at September 30, 2025 and December 31, 2024, are as follows ($ in thousands):

		September 30, 2025								December 31, 2024
		Carrying Value				Estimated Fair Value				Carrying Value				Estimated Fair Value
Financial Assets:
Level 2 Inputs:
Cash and short-term investments		$	732,826			$	732,826			$	567,251			$	567,251
Securities held to maturity			1,268,459				1,233,736				1,335,385				1,259,107
Level 3 Inputs:
Net LHFI			13,382,914				13,427,266				12,929,672				12,886,168
Financial Liabilities:
Level 2 Inputs:
Deposits			15,630,974				15,623,696				15,108,175				15,098,854
Federal funds purchased and securities sold under    repurchase agreements			420,000				420,000				324,008				324,008
Other borrowings			208,366				208,366				301,541				301,541
Subordinated notes			123,867				124,063				123,702				120,625
Junior subordinated debt securities			61,856				52,268				61,856				49,794

Fair Value and the Contractual Principal Outstanding of the LHFS

The following table provides information about the fair value and the contractual principal outstanding of the LHFS accounted for under the fair value option at September 30, 2025 and December 31, 2024 ($ in thousands):

		September 30, 2025				December 31, 2024
Fair value of LHFS		$	123,347			$	102,676
LHFS contractual principal outstanding			121,055				105,322
Fair value less unpaid principal		$	2,292			$	(2,646	)

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