Employee Benefit Plans - Schedule of Estimated Future Benefit Payments (Detail) $ in Thousands	Dec. 31, 2023 USD ($)
Defined Benefit Plan, Expected Future Benefit Payments, Maturity [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 200
FPU Pension Plan
Defined Benefit Plan, Expected Future Benefit Payments, Maturity [Line Items]
2017	3,528	[1]
2018	3,603	[1]
2019	3,617	[1]
2020	3,616	[1]
2021	3,651	[1]
Years 2022 through 2026	17,951	[1]
Chesapeake SERP
Defined Benefit Plan, Expected Future Benefit Payments, Maturity [Line Items]
2017	151	[2]
2018	164	[2]
2019	161	[2]
2020	158	[2]
2021	154	[2]
Years 2022 through 2026	689	[2]
Chesapeake Postretirement Plan
Defined Benefit Plan, Expected Future Benefit Payments, Maturity [Line Items]
2017	42	[2]
2018	46	[2]
2019	45	[2]
2020	48	[2]
2021	49	[2]
Years 2022 through 2026	299	[2]
FPU Medical Plan
Defined Benefit Plan, Expected Future Benefit Payments, Maturity [Line Items]
2017	35	[2]
2018	35	[2]
2019	34	[2]
2020	33	[2]
2021	32	[2]
Years 2022 through 2026	$ 143	[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.