Investments - Other Investments (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
Jun. 30, 2025 |
|---|---|---|---|
| Schedule of Equity Method Investments [Line Items] | |||
| Total other investments | $ 68,998 | $ 80,676 | $ 82,223 |
| Parent Company | |||
| Schedule of Equity Method Investments [Line Items] | |||
| Investments in life insurance policies | 34,197 | 45,606 | 46,221 |
| Investments in gas reserves, non-current | 14,099 | 15,443 | 16,803 |
| Investment in unconsolidated affiliates | 20,702 | 19,627 | 19,199 |
| Total other investments | 68,998 | 80,676 | 82,223 |
| Subsidiaries | |||
| Schedule of Equity Method Investments [Line Items] | |||
| Investments in life insurance policies | 34,197 | 45,606 | 46,221 |
| Investments in gas reserves, non-current | 14,099 | 15,443 | 16,803 |
| Investment in unconsolidated affiliates | 0 | 0 | 0 |
| Total other investments | $ 48,296 | $ 61,049 | $ 63,024 |
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- Definition This element represents the aggregate cost of investments accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Carrying amount as of the balance sheet date of natural gas stored underground in depleted gas reservoirs, aquifers, or salt caverns to meet future seasonal and peak load demands and also as insurance against unforeseen supply disruptions, and deemed to be a noncurrent asset because it is not expected to be used within 12 months or in the normal operating cycle. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition This item represents the amount that could be realized under a life insurance contract or contracts owned by the Entity as of the date of the statement of financial position. Such Entity-owned life insurance policies are commonly known as corporate-owned life insurance (COLI) or bank-owned life insurance (BOLI). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of long-term investments classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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