Business Acquisitions (Details) - USD ($)			1 Months Ended				12 Months Ended
	Nov. 10, 2019	Nov. 01, 2019	Feb. 28, 2021	Oct. 31, 2020	Feb. 29, 2020	Jan. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Acquisition related costs							$ 5,600,000	$ 1,900,000	$ 1,000,000.0
Allocation of the purchase consideration:
Goodwill							1,674,371,000	1,600,265,000	1,487,404,000
Payments To Acquire Assets							$ 36,376,000	$ 0	$ 0
Instart Logic
Allocation of the purchase consideration:
Payments To Acquire Assets					$ 36,400,000
Customer-related intangible assets | Instart Logic
Allocation of the purchase consideration:
Useful life					17 years
Inverse, Inc. | Subsequent Event
Business Acquisition [Line Items]
Cash transferred			$ 20,000,000.0
Asavie
Business Acquisition [Line Items]
Cash transferred				$ 155,000,000.0
Allocation of the purchase consideration:
Total purchase consideration				154,952,000
Cash				26,847,000
Accounts receivable				14,002,000
Prepaid expenses and other current assets				995,000
Property and equipment				2,274,000
Operating lease right-of-use assets				6,104,000
Identifiable intangible assets				58,070,000
Goodwill				70,228,000
Other assets				395,000
Total assets acquired				178,915,000
Accounts payable				(951,000)
Accrued liabilities				(5,926,000)
Deferred revenue				(3,136,000)
Operating lease liabilities				(6,104,000)
Deferred income tax liabilities				(6,965,000)
Other liabilities				(881,000)
Total liabilities assumed				(23,963,000)
Net assets acquired				154,952,000
Goodwill expected tax deductible amount				0
Gross carrying amount of intangible assets				$ 58,070,000
Weighted average useful life				10 years 9 months 18 days
Asavie | Completed technologies
Allocation of the purchase consideration:
Gross carrying amount of intangible assets				$ 17,300,000
Weighted average useful life				10 years 1 month 6 days
Asavie | Customer-related intangible assets
Allocation of the purchase consideration:
Gross carrying amount of intangible assets				$ 40,400,000
Weighted average useful life				11 years 1 month 6 days
Asavie | Trademarks
Allocation of the purchase consideration:
Gross carrying amount of intangible assets				$ 100,000
Weighted average useful life				10 months 24 days
Asavie | Non-compete agreements
Allocation of the purchase consideration:
Gross carrying amount of intangible assets				$ 270,000
Weighted average useful life				2 years 10 months 24 days
ChameleonX
Business Acquisition [Line Items]
Cash transferred	$ 11,900,000
Allocation of the purchase consideration:
Identifiable intangible assets	6,100,000
Goodwill	7,100,000
Goodwill expected tax deductible amount	$ 7,100,000
Weighted average useful life	7 years 1 month 6 days
Exceda
Business Acquisition [Line Items]
Cash transferred		$ 32,700,000
Allocation of the purchase consideration:
Identifiable intangible assets		16,500,000
Goodwill		14,700,000
Goodwill expected tax deductible amount		$ 14,700,000
Weighted average useful life		8 years 1 month 6 days
Indemnification asset		$ 20,000,000.0
Janrain, Inc.
Business Acquisition [Line Items]
Cash transferred						$ 123,600,000
Allocation of the purchase consideration:
Total purchase consideration						123,632,000
Cash						2,223,000
Accounts receivable						7,318,000
Prepaid expenses and other current assets						838,000
Identifiable intangible assets						26,930,000
Goodwill						92,188,000
Deferred tax asset						12,622,000
Other assets						87,000
Total assets acquired						142,206,000
Accounts payable						(1,642,000)
Deferred revenue						(14,336,000)
Other liabilities						(2,596,000)
Total liabilities assumed						(18,574,000)
Net assets acquired						123,632,000
Goodwill expected tax deductible amount						45,700,000
Gross carrying amount of intangible assets						$ 26,930,000
Weighted average useful life						11 years 9 months 18 days
Janrain, Inc. | Completed technologies
Allocation of the purchase consideration:
Gross carrying amount of intangible assets						$ 9,000,000
Weighted average useful life						7 years 10 months 24 days
Janrain, Inc. | Customer-related intangible assets
Allocation of the purchase consideration:
Gross carrying amount of intangible assets						$ 17,700,000
Weighted average useful life						13 years 10 months 24 days
Janrain, Inc. | Trademarks
Allocation of the purchase consideration:
Gross carrying amount of intangible assets						$ 200,000
Weighted average useful life						1 year 10 months 24 days
Janrain, Inc. | Non-compete agreements
Allocation of the purchase consideration:
Gross carrying amount of intangible assets						$ 30,000
Weighted average useful life						1 year 10 months 24 days