Acquisition of SpringCM Inc. - Narrative (Details) - USD ($) $ in Thousands, shares in Millions		12 Months Ended
	Sep. 04, 2018	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Business Acquisition [Line Items]
Cash paid, excluding cash acquired		$ 15,500	$ 0	$ 0
SpringCM Inc.
Business Acquisition [Line Items]
Cash paid, excluding cash acquired	$ 218,800
Portion of cash paid held in escrow	$ 8,200
Period of time held in escrow	18 months
Acquisition costs		$ 1,800
RSUs with vesting conditions | SpringCM Inc.
Business Acquisition [Line Items]
Shares granted to employees (in shares)		0.5
Grant date fair value		$ 26,500