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Share-based Compensation and Other Employment Benefit Plans (Tables) | 12 Months Ended
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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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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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