Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2022		Sep. 30, 2021		Sep. 30, 2022		Sep. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost		$ (19)		$ (19)		$ (57)		$ (57)
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)		143		230		429		690
Defined Benefit Plan Amounts Recognized Gain (Loss)		124		211		372		633
Recognized from accumulated other comprehensive loss		24	[1]	87	[1]	72	[2]	260	[2]
Recognized from regulatory asset		100		124		300		373
Defined Benefit Plan Actuarial Gain Loss, Net Settlement				211				633
Florida Public Utilities Company Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution to pension plan						100
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		300				300
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)		124		155		372		465
Defined Benefit Plan Amounts Recognized Gain (Loss)		124		155		372		465
Recognized from accumulated other comprehensive loss		24	[1]	29	[1]	72	[2]	87	[2]
Recognized from regulatory asset		100		126		300		378
Chesapeake Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)		0		60		0		180
Defined Benefit Plan Amounts Recognized Gain (Loss)		0		60		0		180
Recognized from accumulated other comprehensive loss		0	[1]	60	[1]	0	[2]	180	[2]
Chesapeake Pension SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution to pension plan						100
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		200				200
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)		7		7		21		21
Defined Benefit Plan Amounts Recognized Gain (Loss)		7		7		21		21
Recognized from accumulated other comprehensive loss		7	[1]	7	[1]	21	[2]	21	[2]
Defined Benefit Plan Actuarial Gain Loss, Net Settlement				7				21
Chesapeake Postretirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution to pension plan		100				200
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		200				200
Amortization of prior service cost		(19)		(19)		(57)		(57)
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)		12		10		36		30
Defined Benefit Plan Amounts Recognized Gain (Loss)		(7)		(9)		(21)		(27)
Recognized from accumulated other comprehensive loss		(7)	[1]	(9)	[1]	(21)	[2]	(27)	[2]
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				$ 100
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)				(2)				(6)
Defined Benefit Plan Amounts Recognized Gain (Loss)				(2)				(6)
Recognized from accumulated other comprehensive loss	[2]							(1)
Recognized from regulatory asset				$ (2)				$ (5)

[1] .

[2] 1) See Note 9, Stockholders' Equity.