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Leases - Schedule of Lease Cost Included In Operating Expenses in Condensed Consolidated Statements of Operations (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Oct. 31, 2019
Oct. 31, 2019
Finance lease cost:    
Amortization of finance lease right-of-use assets $ 11,713 $ 29,823
Interest on finance lease liabilities 1,312 2,987
Operating lease cost, gross 12,300 36,533
Variable lease cost, gross 3,040 8,741
Sublease income (2,741) (8,327)
Total lease cost [1] $ 25,624 $ 69,757
[1] Short-term lease cost for the three and nine months ended October 31, 2019 was not material and is not included in the table above.