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