Fair Values of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2023

Fair Value Disclosures [Abstract]

Summary of Methods and Assumptions Used in Estimating Fair Value

The below methods and assumptions were used by the Company in estimating the fair values of its financial instruments. There were no transfers of assets or liabilities between levels in any period presented.

Financial Instrument	Fair Value Level	Methods and Assumptions
Deferred compensation plan assets and liabilities	Level 1	The fair value of the Company’s nonqualified deferred compensation plan for certain executives and other highly compensated employees is based on the fair values of associated assets and liabilities, which are held in mutual funds and are based on the quoted market values of the securities held within the mutual funds.
Pension plan assets	Level 1	The fair values of the Company’s Level 1 pension plan assets, which are equity securities and fixed income investment vehicles, are valued using the quoted market prices of those securities which are actively traded on national exchanges.
Pension plan assets	Level 2	The fair values of the Company’s Level 2 pension plan assets, which are investments that are pooled with other investments in a commingled fund, are valued using the net asset value produced by the fund manager. The assets within the commingled funds have a readily determinable fair market value.
Commodity derivative instruments	Level 2	The fair values of the Company’s commodity derivative instruments are based on current settlement values at each balance sheet date, which represent the estimated amounts the Company would have received or paid upon termination of these instruments. The Company’s credit risk related to the commodity derivative instruments is managed by requiring high standards for its counterparties and periodic settlements. The Company considers nonperformance risk in determining the fair values of commodity derivative instruments.
Long-term debt	Level 2	The carrying amounts of the Company’s variable rate debt approximate the fair values due to variable interest rates with short reset periods. The fair values of the Company’s fixed rate debt are based on estimated current market prices.
Acquisition related contingent consideration	Level 3	The fair value of the Company’s acquisition related contingent consideration is based on internal forecasts and the WACC derived from market data.

Summary of Deferred Compensation Plan Commodity Hedging Agreements and Acquisition Related Contingent Consideration

The following tables summarize the carrying amounts and the fair values by level of the Company’s deferred compensation plan assets and liabilities, pension plan assets, commodity derivative instruments, long-term debt and acquisition related contingent consideration:

	December 31, 2023
(in thousands)	Carrying Amount		Total Fair Value		Fair Value Level 1		Fair Value Level 2		Fair Value Level 3
Assets:
Deferred compensation plan assets	$	64,769	$	64,769	$	64,769	$	—	$	—
Pension plan assets	47,321		47,321		24,153		23,168		—
Commodity derivative instruments	3,747		3,747		—		3,747		—
Liabilities:
Deferred compensation plan liabilities	64,769		64,769		64,769		—		—
Long-term debt	599,159		579,000		—		579,000		—
Acquisition related contingent consideration	669,337		669,337		—		—		669,337

	December 31, 2022
(in thousands)	Carrying Amount		Total Fair Value		Fair Value Level 1		Fair Value Level 2		Fair Value Level 3
Assets:
Deferred compensation plan assets	$	51,257	$	51,257	$	51,257	$	—	$	—
Pension plan assets	261,942		261,942		242,639		19,303		—
Commodity derivative instruments	4,808		4,808		—		4,808		—
Liabilities:
Deferred compensation plan liabilities	51,257		51,257		51,257		—		—
Long-term debt	598,817		575,900		—		575,900		—
Acquisition related contingent consideration	541,491		541,491		—		—		541,491

Summary of Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation

A summary of the Level 3 activity is as follows:

	Fiscal Year
(in thousands)	2023		2022
Beginning balance - Level 3 liability	$	541,491	$	542,105
Payments of acquisition related contingent consideration	(28,208)		(36,515)
Reclassification to current payables	(3,300)		3,600
Increase in fair value	159,354		32,301
Ending balance - Level 3 liability	$	669,337	$	541,491