Commitments and Contingencies (Future Minimum Lease Payments by Year under Non-Cancelable Leases and Computing Infrastructure Platforms) (Detail) $ in Thousands	Jan. 31, 2019 USD ($)
Operating Leased Assets and Non-Leased Assets [Line Items]
2019	$ 64,364
2020	53,116
2021	42,800
2022	33,114
2023	27,059
Thereafter	53,453
Operating leases	273,906
Computing Infrastructure Platforms
Operating Leased Assets and Non-Leased Assets [Line Items]
2019	10,667
2020	14,000
2021	14,000
2022	19,000
2023	20,000
Thereafter	0
Operating leases	77,667
Related Party
Operating Leased Assets and Non-Leased Assets [Line Items]
2019	12,972
2020	16,178
2021	16,562
2022	16,952
2023	14,345
Thereafter	13,610
Operating leases	$ 90,619

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 10
-Section 55
-Paragraph 40
-Subparagraph (Note 3)
-URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section 50
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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 20
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-Paragraph 2
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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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