Employee Benefit Plans - Schedule of Estimated Future Benefit Payments (Detail) $ in Thousands	Dec. 31, 2021 USD ($)
FPU Pension Plan
Defined Benefit Plan, Expected Future Benefit Payments, Maturity [Line Items]
2017	$ 3,451	[1]
2018	3,537	[1]
2019	3,592	[1]
2020	3,690	[1]
2021	3,720	[1]
Years 2022 through 2026	18,588	[1]
Chesapeake SERP
Defined Benefit Plan, Expected Future Benefit Payments, Maturity [Line Items]
2017	151	[2]
2018	149	[2]
2019	147	[2]
2020	160	[2]
2021	157	[2]
Years 2022 through 2026	723	[2]
Chesapeake Postretirement Plan
Defined Benefit Plan, Expected Future Benefit Payments, Maturity [Line Items]
2017	73	[2]
2018	68	[2]
2019	63	[2]
2020	59	[2]
2021	54	[2]
Years 2022 through 2026	218	[2]
FPU Medical Plan
Defined Benefit Plan, Expected Future Benefit Payments, Maturity [Line Items]
2017	71	[2]
2018	70	[2]
2019	71	[2]
2020	70	[2]
2021	69	[2]
Years 2022 through 2026	$ 324	[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.