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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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