Employee Benefit Plans - Schedule of Estimated Future Benefit Payments (Detail) $ in Thousands	Dec. 31, 2022 USD ($)
FPU Pension Plan
Defined Benefit Plan, Expected Future Benefit Payments, Maturity [Line Items]
2017	$ 3,432	[1]
2018	3,503	[1]
2019	3,648	[1]
2020	3,680	[1]
2021	3,675	[1]
Years 2022 through 2026	18,368	[1]
Chesapeake SERP
Defined Benefit Plan, Expected Future Benefit Payments, Maturity [Line Items]
2017	151	[2]
2018	149	[2]
2019	162	[2]
2020	159	[2]
2021	156	[2]
Years 2022 through 2026	707	[2]
Chesapeake Postretirement Plan
Defined Benefit Plan, Expected Future Benefit Payments, Maturity [Line Items]
2017	60	[2]
2018	58	[2]
2019	55	[2]
2020	50	[2]
2021	48	[2]
Years 2022 through 2026	200	[2]
FPU Medical Plan
Defined Benefit Plan, Expected Future Benefit Payments, Maturity [Line Items]
2017	57	[2]
2018	59	[2]
2019	59	[2]
2020	58	[2]
2021	59	[2]
Years 2022 through 2026	$ 227	[2]

[1] The pension plan is funded; therefore, benefit payments are expected to be paid out of the plan assets.

[2] Benefit payments are expected to be paid out of our general funds.