Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	[1]	Oct. 31, 2018	Oct. 31, 2017	[1]
Stock-based compensation	$ 19,918	$ 14,018		$ 56,647	$ 39,186
Cost of subscription services [Member]
Stock-based compensation	405	377		1,166	1,095
Cost of professional services and other [Member]
Stock-based compensation	2,782	2,288		7,767	6,110
Research and development [Member]
Stock-based compensation	5,820	4,765		16,282	12,916
Sales and marketing [Member]
Stock-based compensation	4,825	4,130		13,743	12,150
General and administrative [Member]
Stock-based compensation	$ 6,086	$ 2,458		$ 17,689	$ 6,915

[1] See note 1 of the notes to the condensed consolidated financial statements for a summary of adjustments.