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Share-based Compensation and Other Employment Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2025

Share-Based Payment Arrangement [Abstract]

Schedule of Share-Based Compensation Expense

Total share-based compensation expense recognized for 2025, 2024, and 2023 is presented in the following table by its classification within total non-interest expense.

			Years Ended December 31,
(in thousands)			2025						2024						2023
Salaries and other personnel expense			$	29,988					$	30,625					$	30,610
Merger-related expense			2,753						—						—
Other operating expense			1,403						1,424						1,614
Total share-based compensation expense included in non-interest expense			$	34,144					$	32,049					$	32,224

Schedule of Stock Options Activity

A summary of stock option activity during the years ended December 31, 2025, 2024, and 2023 is presented below.

Stock Options
			2025												2024												2023
(in thousands, except per share data)			Quantity						Weighted-Average Exercise Price						Quantity						Weighted-Average Exercise Price						Quantity						Weighted-Average Exercise Price
Outstanding at beginning of year			117						$	33.14					416						$	31.13					1,113						$	23.51
Options exercised			(48)						30.47						(299)						30.35						(697)						18.97
Options forfeited/expired/canceled			—						—						—						—						—						—
Options outstanding at end of year			69						$	35.01					117						$	33.14					416						$	31.13
Options exercisable at end of year			69						$	35.01					117						$	33.14					416						$	31.13

Schedule of Weighted Average Assumptions

The fair value of performance share units, which include a market condition, was estimated on the date of grant using a Monte Carlo simulation model with the following weighted average assumptions:

						2025						2024						2023
Risk-free interest rate						4.31		%				4.39		%				4.38		%
Expected stock price volatility						39.1						39.1						48.3
Simulation period						2.9 years						2.9 years						2.9 years

Schedule of Restricted Share Units and Performance Share Units Outstanding and Changes

A summary of restricted share units and performance share units outstanding and changes during the years ended December 31, 2025, 2024, and 2023 is presented below.

						Restricted Share Units												Performance Share Units
(in thousands, except per share data)						Quantity						Weighted-Average Grant Date Fair Value						Quantity						Weighted-Average Grant Date Fair Value
Outstanding at December 31, 2022						1,224						$	41.80					472						$	44.11
Granted						807						41.04						192						46.18
Vested						(654)						38.47						(170)						35.75
Forfeited						(84)						45.18						—						—
Outstanding at December 31, 2023						1,293						42.90						494						47.16
Granted						870						37.62						264						37.96
Vested						(601)						43.37						(290)						42.94
Forfeited						(80)						41.13						(4)						50.14
Outstanding at December 31, 2024						1,482						40.15						464						45.63
Granted						1,414						53.29						218						55.80
Vested						(690)						42.90						(282)						51.11
Forfeited						(74)						42.48						(14)						41.84
Outstanding at December 31, 2025						2,132						$	48.01					386						$	45.95

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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Tabular disclosure of the changes in outstanding nonvested restricted stock units.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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