Acquisitions - Schedule of Consideration and Net Assets Acquired (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 17, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Assets acquired and liabilities assumed:
Goodwill		$ 1,593,670		$ 1,593,670		$ 581,174
Stock-based compensation expense		12,033	$ 1,559	21,101	$ 3,212
Series of Individually Immaterial Business Acquisitions
Business Combination, Separately Recognized Transactions [Line Items]
Cash paid at closing				1,039,398	$ 98,298	98,298
Shares issued at closing				182,390		0
Contingent consideration from acquisitions		4,991		4,991		2,380
Deferred, non-contingent consideration, net		9,593		9,593		1,416
Total consideration				1,236,372		102,094
Assets acquired and liabilities assumed:
Cash		36,847		36,847		5,266
Prepaid and other current assets		21,594		21,594		8,701
Operating lease right-of-use assets		12,418		12,418		2,529
Property and equipment		6,310		6,310		499
Investments		2,211		2,211		0
Other assets		523		523		36
Total identifiable assets acquired excluding goodwill		310,654		310,654		34,762
Accruals and other current liabilities		(24,580)		(24,580)		(4,991)
Deferred revenues		(16,041)		(16,041)		(5,351)
Operating lease liabilities		(12,336)		(12,336)		(2,529)
Deferred income taxes		(54,142)		(54,142)		(1,701)
Other liabilities		(895)		(895)		(86)
Total liabilities assumed		(107,994)		(107,994)		(14,658)
Net identifiable assets acquired excluding goodwill		202,660		202,660		20,104
Goodwill		1,033,712		1,033,712		81,990
Net assets acquired		1,236,372		1,236,372		102,094
Series of Individually Immaterial Business Acquisitions | Software and technology
Assets acquired and liabilities assumed:
Finite-lived intangibles		44,735		$ 44,735		$ 2,207
Series of Individually Immaterial Business Acquisitions | Software and technology | Weighted Average
Business Combination, Separately Recognized Transactions [Line Items]
Acquired finite-lived intangible assets, weighted average useful life				5 years		3 years
Series of Individually Immaterial Business Acquisitions | Customer relationships
Assets acquired and liabilities assumed:
Finite-lived intangibles		140,299		$ 140,299		$ 11,371
Series of Individually Immaterial Business Acquisitions | Customer relationships | Weighted Average
Business Combination, Separately Recognized Transactions [Line Items]
Acquired finite-lived intangible assets, weighted average useful life				9 years		6 years
Series of Individually Immaterial Business Acquisitions | Trademarks
Assets acquired and liabilities assumed:
Finite-lived intangibles		41,417		$ 41,417		$ 3,953
Series of Individually Immaterial Business Acquisitions | Trademarks | Weighted Average
Business Combination, Separately Recognized Transactions [Line Items]
Acquired finite-lived intangible assets, weighted average useful life				10 years		7 years
Series of Individually Immaterial Business Acquisitions | Non-compete agreements
Business Combination, Separately Recognized Transactions [Line Items]
Acquired finite-lived intangible assets, weighted average useful life				5 years
Assets acquired and liabilities assumed:
Finite-lived intangibles		0		$ 0		$ 200
Series of Individually Immaterial Business Acquisitions | In-process research and development
Assets acquired and liabilities assumed:
Finite-lived intangibles		$ 4,300		$ 4,300		$ 0
Seequent
Assets acquired and liabilities assumed:
Award service period				2 years
Fair value adjustment of stock consideration				$ 16,943
Seequent | Common Class B Stock Subject to Service Conditions
Assets acquired and liabilities assumed:
Stock-based compensation expense				$ 5,452
Seequent | Class B Common Stock
Assets acquired and liabilities assumed:
Number of shares sold (in shares)	3,141,342
Number of shares sold subject to employment service conditions (in shares)		83,627