Deferred Revenue and Commissions - Deferred Commissions (Details) - USD ($)	3 Months Ended		9 Months Ended
	Nov. 01, 2020	Oct. 31, 2019	Nov. 01, 2020	Oct. 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	$ 144,687,000	$ 118,568,000	$ 139,204,000	$ 114,973,000
Additions	36,234,000	34,071,000	96,530,000	82,381,000
Recognition of deferred commissions	(28,832,000)	(29,508,000)	(83,645,000)	(74,223,000)
Ending balance	$ 152,089,000	123,131,000	$ 152,089,000	123,131,000
Commission expected to be recognized over the next 12 months (percent)	28.00%		28.00%
Impairment of capitalized commissions	$ 0	$ 0	$ 0	$ 0