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Segment Reporting - Reconciliation of Pretax Income from Continuing Operations to Adjusted Pretax Operating Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |
Adjusted pretax operating income |  | $ 206,092 | $ 217,396 | $ 598,122 | $ 646,906
Net gains (losses) on investments and other financial instruments |  | 1,285 | 6,721 | 1,135 | 2,403
Pretax income from continuing operations |  | 198,694 | 214,306 | 590,190 | 635,223
Operating Segments [Member] |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |
Pretax income from continuing operations |  | 198,694 | 214,306 | 590,190 | 635,223
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |
Net gains (losses) on investments and other financial instruments |  | 1,285 | 6,721 | 1,135 | 2,403
Impairment of other long-lived assets and other non-operating items | [1] | $ (8,683) | $ (9,811) | $ (9,067) | $ (14,086)
[1] | For the three and nine months ended September 30, 2025, primarily relates to acquisition-related expenses. For the three and nine months ended September 30, 2024, primarily relates to impairment of internal-use software.

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- Definition This concept represents the gains and losses on investments and other financial instruments for the period excluding the impact of changes in the present value of insurance claims and recoveries on insured credit derivatives and VIEs, based on the company's ongoing insurance loss monitoring, which are a component of segment expenses. Also includes other than temporarily impaired losses recognized in earnings. + References No definition available. + Details
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