Deferred Revenue and Commissions - Deferred Commissions (Details) - USD ($)	3 Months Ended		6 Months Ended
	Aug. 02, 2020	Jul. 31, 2019	Aug. 02, 2020	Jul. 31, 2019
Revenue from Contract with Customer [Abstract]
Useful life of deferred commissions related to subscription services revenue			6 years
Deferred Commissions [Roll Forward]
Beginning balance	$ 139,204,000	$ 114,973,000	$ 142,363,000	$ 113,257,000
Additions	60,296,000	48,310,000	30,534,000	30,074,000
Recognition of deferred commissions	(54,813,000)	(44,715,000)	(28,210,000)	(24,763,000)
Ending balance	$ 144,687,000	118,568,000	$ 144,687,000	118,568,000
Commission expected to be recognized over the next 12 months (percent)	27.00%		27.00%
Impairment of capitalized commissions	$ 0	$ 0	$ 0	$ 0