Income Taxes - Schedule of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Income Tax Disclosure [Abstract]
Beginning balance	$ 42,695	$ 37,531	$ 34,117
Additions based on tax positions related to the current year	3,360	4,964	3,922
Additions for tax positions of prior years	16	252	109
Reductions for tax positions in prior years	(12,483)	0	(552)
Settlements for prior periods	(6,087)	0	0
Lapse of applicable statute of limitations	(245)	(52)	(65)
Ending balance	$ 27,256	$ 42,695	$ 37,531