Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Thousands		12 Months Ended
		Jan. 31, 2021		Jan. 31, 2020		Jan. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows for operating leases		$ 59,478		$ 48,675
Operating cash flows for finance leases		6,358		4,052
Financing cash flows for finance leases		60,020		38,542		$ 23,930
Right-of-use assets obtained in exchange of lease obligations
Operating leases	[1]	39,267		233,255
Finance leases		$ 31,282	[1]	$ 103,420	[1]	$ 50,999

[1] Amounts disclosed for the year ended January 31, 2020 include the adoption impact of ASC Topic 842 on the opening balance sheet as of February 1, 2019