Business Acquisition, Equity Interest, Number Of Monthly Installments For Remaining Shares Issuable

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Business Acquisition, Equity Interest, Remaining Number Of Shares Issuable

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Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Assets Acquired

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Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Noncurrent Liability

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Goodwill, Divestitures And Other Adjustments

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Number of shares of equity interest issued or issuable by acquirer as part of consideration transferred in business combination.

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The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

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Amount of pro forma revenue of combined entity as if acquisition date of business combination occurred as of beginning of period.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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Amount of liability recognized arising from contingent consideration in a business combination.

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Amount of liability assumed in business combination and recognized at acquisition date, classified as other and noncurrent.

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Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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Amount of increase (decrease) from measurement period adjustment of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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BUSINESS COMBINATIONS - Additional Information (Details) $ in Thousands, shares in Millions			12 Months Ended
	Nov. 01, 2025 USD ($)	Nov. 01, 2024 USD ($) shares	Dec. 31, 2025 USD ($) shares	Dec. 31, 2025 USD ($)	Nov. 01, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jan. 01, 2026 installment shares
Business Combination, Contingent Consideration [Line Items]
Cash consideration				$ 1,625		$ 1,087,521	$ 53,110
Goodwill			$ 2,329,799	2,329,799		2,331,461	865,180
Goodwill, divestitures and other adjustments				$ (3,538)		(6,371)
Client lists
Business Combination, Contingent Consideration [Line Items]
Weighted average useful life				10 years
Financial Services
Business Combination, Contingent Consideration [Line Items]
Goodwill			1,997,294	$ 1,997,294		2,001,232	548,856
Goodwill, divestitures and other adjustments				(5,814)		(6,371)
Benefits and Insurance Services
Business Combination, Contingent Consideration [Line Items]
Goodwill			$ 332,505	332,505		330,229	$ 316,324
Goodwill, divestitures and other adjustments				2,276		0
Marcum LLP
Business Combination, Contingent Consideration [Line Items]
Cash consideration		$ 1,063,000
Common stock		$ 934,700
Common stock issued (in shares) \| shares		13.6
Business acquisitions (in shares) \| shares			6.4
Reduction of goodwill				5,800	$ 5,800
Reduction of the estimated settlement amounts associated with acquired non-current liability				21,000
Other non-current liabilities	$ 1,295	$ 61,967	$ 40,000	40,000	1,295	61,000
Increase in accrued personnel obligations				10,600
Net decrease in assets acquired				4,600
Amount of goodwill deductible for income tax purposes			899,800	899,800
Goodwill	1,439,270	1,445,070	1,439,300	1,439,300	1,439,270
Total consideration transferred	1,997,781	1,997,781
Contingent purchase price assumed (current and non-current)	$ 24,947	$ 24,232			$ 24,947
Marcum LLP \| Subsequent Event
Business Combination, Contingent Consideration [Line Items]
Remaining number of shares issuable (in shares) \| shares								7.2
Number of monthly installments for remaining shares issuable \| installment								24
Marcum LLP \| Financial Services
Business Combination, Contingent Consideration [Line Items]
Goodwill			1,427,700	1,427,700
Marcum LLP \| Benefits and Insurance Services
Business Combination, Contingent Consideration [Line Items]
Goodwill			11,600	11,600
IDG Acquisition
Business Combination, Contingent Consideration [Line Items]
Total consideration transferred				3,100
Cash payment amount				1,600
Contingent purchase price assumed (current and non-current)			$ 1,400	1,400
Annual aggregate revenue				$ 200
2024 Acquisitions
Business Combination, Contingent Consideration [Line Items]
Common stock						2,400
Total consideration transferred						42,200
Cash payment amount						24,000
Contingent purchase price assumed (current and non-current)						15,800
Annual aggregate revenue						$ 28,700