Fair Values of Financial Instruments - Deferred Compensation Plan Commodity Hedging Agreements and Acquisition Related Contingent Consideration (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Commodity derivative instruments
Assets:
Commodity derivative instruments	$ 3,747	$ 4,808
Fair Value Level 3
Liabilities:
Acquisition related contingent consideration	669,337	541,491	$ 542,105
Carrying Amount
Assets:
Deferred compensation plan assets	64,769	51,257
Pension plan assets	47,321	261,942
Liabilities:
Deferred compensation plan liabilities	64,769	51,257
Long-term debt	599,159	598,817
Acquisition related contingent consideration	669,337	541,491
Carrying Amount | Commodity derivative instruments
Assets:
Commodity derivative instruments	3,747	4,808
Total Fair Value
Assets:
Deferred compensation plan assets	64,769	51,257
Pension plan assets	47,321	261,942
Liabilities:
Deferred compensation plan liabilities	64,769	51,257
Long-term debt	579,000	575,900
Acquisition related contingent consideration	669,337	541,491
Total Fair Value | Commodity derivative instruments
Assets:
Commodity derivative instruments	3,747	4,808
Total Fair Value | Fair Value Level 1
Assets:
Deferred compensation plan assets	64,769	51,257
Pension plan assets	24,153	242,639
Liabilities:
Deferred compensation plan liabilities	64,769	51,257
Long-term debt	0	0
Acquisition related contingent consideration	0	0
Total Fair Value | Fair Value Level 1 | Commodity derivative instruments
Assets:
Commodity derivative instruments	0	0
Total Fair Value | Fair Value Level 2
Assets:
Deferred compensation plan assets	0	0
Pension plan assets	23,168	19,303
Liabilities:
Deferred compensation plan liabilities	0	0
Long-term debt	579,000	575,900
Acquisition related contingent consideration	0	0
Total Fair Value | Fair Value Level 2 | Commodity derivative instruments
Assets:
Commodity derivative instruments	3,747	4,808
Total Fair Value | Fair Value Level 3
Assets:
Deferred compensation plan assets	0	0
Pension plan assets	0	0
Liabilities:
Deferred compensation plan liabilities	0	0
Long-term debt	0	0
Acquisition related contingent consideration	669,337	541,491
Total Fair Value | Fair Value Level 3 | Commodity derivative instruments
Assets:
Commodity derivative instruments	$ 0	$ 0