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Segment Information Segment Profit Reconciliation (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Income from operations | $ 337,796 | $ 482,616 | $ 500,336
Interest expense | 49,439 | 38,114 | 1,551
Foreign currency exchange (gains) losses, net | (7,347) | (205) | 2,753
Debt and Equity Securities, Unrealized Gain (Loss) | 1,252,251 | 5,193,554 | (4,926,248)
Other Nonoperating Income (Expense) | (106,443) | (44,574) | (26,775)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest | (850,104) | (4,704,273) | 5,449,055
Operating Segments [Member] |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Income from operations | 337,800 | 482,600 | 500,300
Segment Reconciling Items [Member] |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Foreign currency exchange (gains) losses, net | 7,300 | 200 | (2,700)
Debt and Equity Securities, Unrealized Gain (Loss) | (1,252,300) | (5,193,600) | 4,926,200
Other Nonoperating Income (Expense) | 106,400 | 44,600 | 26,800
Segment Reconciling Items [Member] | Interest Expense |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Interest expense | $ (49,300) | $ (38,100) | $ (1,500)

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