Employee Benefit Plans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation obligation	$ 9,775		$ 9,775		$ 9,050
Florida Public Utilities Company Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	599	$ 633	1,797	$ 1,899
Expected return on plan assets	(724)	(668)	(2,172)	(2,004)
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	69	110	207	330
Total periodic cost	(56)	$ 75	(168)	$ 225
Rabbi Trust Associated With Deferred Compensation Plan
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation obligation	$ 14,100		$ 14,100		$ 12,300