Financial Instruments and Risk Management - Carrying Value of Assets and Liabilities Recorded at Fair Value on Recurring Basis (Details) - Fair Value - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Liabilities:
Liabilities	$ 20,569	$ 17,785
Commodity swaps
Liabilities:
Derivative liability	1,344	0
Nonqualified employee savings plan
Liabilities:
Nonqualified employee savings plan	19,225	17,785
Level 1
Liabilities:
Liabilities	19,225	17,785
Level 1 | Commodity swaps
Liabilities:
Derivative liability	0	0
Level 1 | Nonqualified employee savings plan
Liabilities:
Nonqualified employee savings plan	19,225	17,785
Level 2
Liabilities:
Liabilities	1,344	0
Level 2 | Commodity swaps
Liabilities:
Derivative liability	1,344	0
Level 2 | Nonqualified employee savings plan
Liabilities:
Nonqualified employee savings plan	0	0
Level 3
Liabilities:
Liabilities	0	0
Level 3 | Commodity swaps
Liabilities:
Derivative liability	0	0
Level 3 | Nonqualified employee savings plan
Liabilities:
Nonqualified employee savings plan	$ 0	$ 0