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Employee Benefit Plans (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2025 | Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Deferred compensation obligation | $ 12,500 |  | $ 12,500 |  |  | $ 9,800
Employee Deferral Rate |  |  | 80.00% |  |  |
Deferred Compensation Employer Matching Contribution Rate |  |  | 6.00% |  |  |
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year |  |  |  |  | $ 300 |
Florida Public Utilities Company Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Interest cost | 600 | $ 600 | $ 1,800 | $ 1,800 |  |
Expected return on plan assets | (700) | (800) | (2,100) | (2,200) |  |
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) | 100 | 100 | 100 | 200 |  |
Total periodic cost | 0 | $ (100) | (200) | $ (200) |  |
Rabbi Trust Associated With Deferred Compensation Plan |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Deferred compensation obligation | $ 16,800 |  | $ 16,800 |  |  | $ 14,400

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- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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