Employee Benefit Plans (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2025	Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation obligation	$ 12.2			$ 9.8
Employee Deferral Rate	80.00%
Deferred Compensation Employer Matching Contribution Rate	6.00%
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year			$ 0.3
Florida Public Utilities Company Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 0.6	$ 0.6
Expected return on plan assets	(0.7)	(0.7)
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	0.0	0.1
Total periodic cost	(0.1)	$ 0.0
Rabbi Trust Associated With Deferred Compensation Plan
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation obligation	$ 14.4