Summary of Significant Accounting Policies - Marketable Securities and Long-Term Restricted Investments and Spare Parts and Supplies (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Summary of Significant Accounting Policies [Line Items]
Marketable securities	$ 101,042	$ 95,941
Inventory allowance	17,126	$ 17,146
Spare parts and supplies carrying value	$ 0

Amount of inventory reserves for last-in first-out (LIFO) and other inventory valuation methods.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 330
-SubTopic 10
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483080/330-10-50-1

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant