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Stock Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2025
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of Stock Option Plans | A summary of activity under United’s stock option plans as of December 31, 2025, and the changes during the year of 2025 are presented below:
|  | Year ended December 31, 2025 |
|  |  |  |  |  |  |  | Weighted Average |
(Dollars in thousands, except per share amounts) |  |  |  |  | Aggregate Intrinsic |  |  | Remaining Contractual |  |  |  |
| Exercise Price |
|  | Shares |  |  | Value |  |  | Term (Yrs.) |
Outstanding at January 1, 2025 |  |  | 1,049,668 |  |  |  |  |  |  |  |  |  |  | $ | 36.29 |
Exercised |  |  | (36,612 | ) |  |  |  |  |  |  |  |  |  |  | 26.07 |
Forfeited or expired |  |  | (103,540 | ) |  |  |  |  |  |  |  |  |  |  | 35.62 |
Outstanding at December 31, 2025 |  |  | 909,516 |  |  | $ | 3,057 |  |  |  | 2.6 |  |  | $ | 36.78 |
Exercisable at December 31, 2025 |  |  | 909,516 |  |  | $ | 3,057 |  |  |  | 2.6 |  |  | $ | 36.78 |
Changes to United's Restricted Common Shares | The following summarizes the changes to United’s restricted common shares for the year ended December 31, 2025:
|  | Number of Shares |  |  | Weighted-Average Grant Date Fair Value Per Share
Nonvested at January 1, 2025 |  |  | 310,027 |  |  | $ 36.58
Granted |  |  | 184,515 |  |  | 36.77
Vested |  |  | (152,433 | ) |  | 36.94
Forfeited |  |  | (16,682 | ) |  | 36.54
Outstanding at December 31, 2025 |  |  | 325,427 |  |  | $ 36.52
Status of United's Nonvested Stock Option Awards | The following table summarizes the status of United’s nonvested RSUs during the year ended December 31, 2025:
|  | Shares |  |  | Weighted-Average Grant Date Fair Value Per Share
Nonvested at January 1, 2025 |  |  | 490,119 |  |  | $ 35.41
Granted |  |  | 256,385 |  |  | 35.35
Vested |  |  | (148,597 | ) |  | 35.81
Forfeited or expired |  |  | (2,422 | ) |  | 36.26
Nonvested at December 31, 2025 |  |  | 595,485 |  |  | $ 35.28

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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 Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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