Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Investments, at fair value	$ 10,866		$ 10,576
Deferred compensation obligation	8,816		7,060
Rabbi Trust Investments Assets	10,800		$ 10,600
Florida Public Utilities Company Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	110	$ 124
Defined Benefit Plan Amounts Recognized Gain (Loss)	110
Recognized from accumulated other comprehensive loss	21	24
Recognized from regulatory asset	89	100
Chesapeake Pension SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	200
Defined Benefit Plan Amounts Recognized Gain (Loss)	124	$ 124
Chesapeake Postretirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	100
Florida Public Utilities Company Medical Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	$ 100