Acquisitions and Investments (Details) item in Thousands, $ in Thousands		1 Months Ended		3 Months Ended			6 Months Ended		12 Months Ended		42 Months Ended
	Nov. 30, 2020 USD ($) tranche	Oct. 31, 2021 USD ($)	Aug. 31, 2020 USD ($) item	Dec. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2019 USD ($) fund	Dec. 31, 2021 USD ($)	Aug. 31, 2018 USD ($)
Allocation of Purchase Price
Intangible assets, net				$ 2,157		$ 33,712	$ 2,157	$ 33,712			$ 2,157
Goodwill				240,921	$ 240,353		240,921		$ 240,353		240,921
Deferred revenue				(1,084)		(2,096)	(1,084)	(2,096)			(1,084)
Pro forma results
Revenues						382,911		762,518
Income (loss) from operations						38,461		51,347
Net income (loss)						24,723		38,159
Two early stage funds
Pro forma results
Number of limited partnerships invested in | fund										2
Investment commitment										$ 13,000
Investments in limited partnerships											7,900
New Markets
Pro forma results
Investment recorded at cost				2,200			2,200				2,200
Rethink
Pro forma results
Equity method investment											5,700
Tallo
Pro forma results
Investment			$ 2,300									$ 6,700
Ownership percentage			46.10%									39.50%
Convertible note			$ 5,000
Ownership percentage on an if-converted basis			53.00%
Term of debt			48 months
Loans receivable		$ 3,000
Loans receivable interest rate		5.00%
Maturity term of loans receivable		5 years
Loans receivable funded amount				2,000			2,000				2,000
Tallo | Series D Preferred shares
Pro forma results
Convertible into Series D Preferred shares | item			3,670
Tallo | Base Rate
Pro forma results
Interest rate spread added to base rate (as a percent)			0.25%
MedCerts
Acquisition and Investments
Ownership percentage acquired (as a percent)	100.00%
Total consideration	$ 70,000
Contingent consideration	$ 10,800
Contingent consideration repayment term	18 months
Number of tranches purchase price is payable in | tranche	2
Payment Related to Finalization of Working Capital					$ 300
Expense on Estimate of Fair Value of Contingent Consideration				500			600		300
Allocation of Purchase Price
Cash	$ 205
Current assets, excluding cash	5,074
Property and equipment, net	1,896
Intangible assets, net	26,607
Goodwill	51,033
Current liabilities	(2,201)
Deferred revenue	(1,562)
Deferred tax asset (liability)	16
Total consideration	$ 81,068
Percentage of enterprise value	49.00%
Reduced percentage	49.00%
Original purchase price	$ 34,300
Revenues of acquiree				9,100		1,000	17,900	1,000
Income (loss) of acquiree				(300)		(1,200)	(600)	(1,200)
Pro forma results
Expense on Estimate of Fair Value of Contingent Consideration				500			600		$ 300
MedCerts | Accrued Liabilities
Acquisition and Investments
Contingent Consideration Fair Value Disclosure				11,700			11,700				$ 11,700
MedCerts | Customer relationships
Allocation of Purchase Price
Intangible assets, net	$ 12,072
Estimated useful life (in years)	5 years 10 months 2 days
MedCerts | Developed technology
Allocation of Purchase Price
Intangible assets, net	$ 11,970
Estimated useful life (in years)	7 years
MedCerts | Trade names
Allocation of Purchase Price
Intangible assets, net	$ 2,565
Estimated useful life (in years)	5 years
MedCerts | Purchase Price Payable at Closing of Acquisition
Acquisition and Investments
Purchase price paid at closing	$ 55,000
MedCerts | Purchase Price Payable at Eighteen Month Anniversary from Closing of Acquisition
Acquisition and Investments
Purchase price paid at closing	$ 15,000
Tech Elevator
Acquisition and Investments
Ownership percentage acquired (as a percent)	100.00%
Total consideration	$ 23,500
Working capital	2,200
Allocation of Purchase Price
Cash	1,736
Current assets, excluding cash	518
Property and equipment, net	513
Operating lease right-of-use assets, net	724
Intangible assets, net	7,105
Goodwill	17,897
Other assets	377
Current liabilities	(267)
Deferred revenue	(534)
Deferred tax asset (liability)	(1,650)
Current operating lease liability	(420)
Long-term operating lease liability	(304)
Total consideration	25,695
Revenues of acquiree				3,800		600	7,700	600
Income (loss) of acquiree				$ 100		$ (300)	$ 400	$ (300)
Tech Elevator | Customer relationships
Allocation of Purchase Price
Intangible assets, net	$ 311
Estimated useful life (in years)	3 years 11 months 1 day
Tech Elevator | Developed technology
Allocation of Purchase Price
Intangible assets, net	$ 2,796
Estimated useful life (in years)	5 years
Tech Elevator | Trade names
Allocation of Purchase Price
Intangible assets, net	$ 3,998
Estimated useful life (in years)	15 years