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Goodwill and Intangible Assets, Net - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Finite-Lived Intangible Assets, Net [Abstract]
Weighted-average Remaining Useful Life (Years)	6 years 6 months
Estimated Fair Value	$ 205,610	$ 114,610
Accumulated Amortization	(84,362)	(58,744)
Acquisition-related intangibles, net, excluding cumulative translation adjustment	121,248	55,866
Cumulative translation adjustment	580	634
Acquisition-related Intangibles, Net	$ 121,828	56,500
Existing technology
Finite-Lived Intangible Assets, Net [Abstract]
Weighted-average Remaining Useful Life (Years)	3 years 10 months 24 days
Estimated Fair Value	$ 72,994	31,594
Accumulated Amortization	(35,613)	(25,164)
Acquisition-related intangibles, net, excluding cumulative translation adjustment	$ 37,381	6,430
Customer contracts & related relationships
Finite-Lived Intangible Assets, Net [Abstract]
Weighted-average Remaining Useful Life (Years)	7 years 10 months 24 days
Estimated Fair Value	$ 110,082	65,782
Accumulated Amortization	(29,393)	(19,071)
Acquisition-related intangibles, net, excluding cumulative translation adjustment	$ 80,689	46,711
Other
Finite-Lived Intangible Assets, Net [Abstract]
Weighted-average Remaining Useful Life (Years)	1 year 2 months 12 days
Estimated Fair Value	$ 22,534	17,234
Accumulated Amortization	(19,356)	(14,509)
Acquisition-related intangibles, net, excluding cumulative translation adjustment	$ 3,178	$ 2,725

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- Definition

Finite-Lived Intangible Assets, Cumulative Translation Adjustment

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 926
-SubTopic 20
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959

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Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 926
-SubTopic 20
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959

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