Fair Value Measurements - Valuation of Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Assets (Liabilities)
Natural gas derivatives		$ 3,930
Total	$ 4,316	3,930
Fair value on a recurring basis
Assets (Liabilities)
Natural gas derivatives	2,670	(3,930)
Total	2,670	3,930
Fair value on a recurring basis | Level 1
Assets (Liabilities)
Natural gas derivatives	0	0
Total	0	0
Fair value on a recurring basis | Level 2
Assets (Liabilities)
Natural gas derivatives	2,670	(3,930)
Total	2,670	3,930
Fair value on a recurring basis | Level 3
Assets (Liabilities)
Natural gas derivatives	0	0
Total	$ 0	$ 0