Employee Benefit Plans - Additional Information (Detail) $ in Thousands		12 Months Ended
		Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Total unrecognized cost		$ 12,800
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		$ 200
Required period of service for eligibility		3 months
Percentage of eligible participants contribution to the plan		100.00%
Employer matching contribution vested, percentage		100.00%
Deferred Compensation Arrangement with Individual, Requisite Service Period		2 years
Defined Benefit Plan, Benefit Obligation			2
Employee contribution age		55 years
Deferral rate		80.00%
Deferred Compensation Employer Matching Contribution Rate		6.00%
Number Of Years to Collect Benefits		20 years
Deferral rate increase, minimum		1.00%
Employer contributions to pension plan		$ 6,600	$ 6,200	$ 5,900
Shares reserved to fund future contributions | shares		798,586
Investments, Fair Value Disclosure		$ 12,282	10,576
Deferred compensation obligation		$ 9,050	7,060
Pension Settlement Expense				$ 2,000
Minimum
Defined Benefit Plan Disclosure [Line Items]
Maximum percentage of eligible compensation		3.00%
Maximum
Defined Benefit Plan Disclosure [Line Items]
Maximum percentage of eligible compensation		6.00%			10.00%
Number Of Years to Collect Benefits		15 years
FPU Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Total unrecognized cost		$ 10,800
Expected contribution	[1]	3,528
Chesapeake SERP
Defined Benefit Plan Disclosure [Line Items]
Expected contribution	[2]	$ 151
Medical
Defined Benefit Plan Disclosure [Line Items]
Health care inflation rate		5.00%
Chesapeake Postretirement Plan
Defined Benefit Plan Disclosure [Line Items]
Total unrecognized cost		$ 1,200
Unfunded accumulated benefit obligation		$ (1,100)	(600)
Health care inflation rate		6.00%
Expected contribution	[2]	$ 42
FPU Medical Plan
Defined Benefit Plan Disclosure [Line Items]
Unfunded accumulated benefit obligation		$ (400)	(700)
Health care inflation rate		5.00%
Expected contribution	[2]	$ 35
FPU Medical Plan and Chesapeake OPRB [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Number of Plans		2
Rabbi Trust Associated With Deferred Compensation Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation obligation		$ 12,300	10,600
Deferred Compensation Equity		$ 9,100	$ 7,100

[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.