Fair Values of Financial Instruments - Deferred Compensation Plan Commodity Hedging Agreements and Acquisition Related Contingent Consideration (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Commodity derivative instruments
Assets:
Commodity derivative instruments	$ 4,808	$ 7,714
Fair Value Level 3
Liabilities:
Acquisition related contingent consideration	541,491	542,105	$ 434,694
Carrying Amount
Assets:
Deferred compensation plan assets	51,257	60,461
Pension plan assets	261,942	328,250
Liabilities:
Deferred compensation plan liabilities	51,257	60,461
Long-term debt	598,817	723,443
Acquisition related contingent consideration	541,491	542,105
Carrying Amount | Commodity derivative instruments
Assets:
Commodity derivative instruments	4,808	7,714
Total Fair Value
Assets:
Deferred compensation plan assets	51,257	60,461
Pension plan assets	261,942	328,250
Liabilities:
Deferred compensation plan liabilities	51,257	60,461
Long-term debt	575,900	772,600
Acquisition related contingent consideration	541,491	542,105
Total Fair Value | Commodity derivative instruments
Assets:
Commodity derivative instruments	4,808	7,714
Total Fair Value | Fair Value Level 1
Assets:
Deferred compensation plan assets	51,257	60,461
Pension plan assets	242,639	313,893
Liabilities:
Deferred compensation plan liabilities	51,257	60,461
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	19,303	14,357
Liabilities:
Deferred compensation plan liabilities	0	0
Long-term debt	575,900	772,600
Acquisition related contingent consideration	0	0
Total Fair Value | Fair Value Level 2 | Commodity derivative instruments
Assets:
Commodity derivative instruments	4,808	7,714
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	541,491	542,105
Total Fair Value | Fair Value Level 3 | Commodity derivative instruments
Assets:
Commodity derivative instruments	$ 0	$ 0