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Investing Receivables - Components of Investing Receivables (Details) - Investing Receivables - USD ($) $ in Thousands | Mar. 31, 2026 | Dec. 31, 2025 | Mar. 31, 2025 | Dec. 31, 2024
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized cost basis | $ 73,175 | $ 73,431 |  |
Allowance for credit losses | (3,253) | (3,575) | $ (3,362) | $ (2,792)
Investing receivables, net | 69,922 | 69,856 |  |
Notes receivable from the City of Huntsville |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized cost basis | 64,508 | 64,461 |  |
Other investing loans receivable |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized cost basis | $ 8,667 | $ 8,970 |  |

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