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Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Thousands		3 Months Ended
		Apr. 30, 2020	Apr. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows for operating leases		$ 13,514	$ 11,358
Operating cash flows for finance leases		1,997	759
Financing cash flows for finance leases		17,356	9,154
Right-of-use assets obtained in exchange of lease obligations
Operating leases	[1]	29,347	229,355
Finance leases	[1]	$ 14,825	$ 21,414
[1] Amounts disclosed for the three months ended April 30, 2019 include the adoption impact of ASC Topic 842 on the opening balance sheet as of February 1, 2019.

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Cash flow operating and financing activities lessee.

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Right-of-use assets obtained in exchange of lease obligations.

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Amount of interest paid on finance lease liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (g)(1)
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 45
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918643-209977

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Amount of cash outflow for principal payment on finance lease.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918643-209977

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-Subparagraph (g)(1)
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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918643-209977

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-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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-URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971

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