Leases - Schedule of Lease Cost Included In Operating Expenses in Consolidated Statements of Operations (Details) - USD ($) $ in Thousands		12 Months Ended
		Jan. 31, 2021	Jan. 31, 2020
Finance lease cost:
Amortization of finance lease right-of-use assets		$ 54,630	$ 43,448
Interest on finance lease liabilities		5,753	4,483
Operating lease cost, gross		54,243	48,870
Variable lease cost, gross		9,288	11,862
Sublease income		(10,969)	(11,504)
Total lease cost	[1]	$ 112,945	$ 97,159

[1] Short-term lease cost was not material for the periods presented and is not included in the table above