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Debt - Schedule of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Debt Disclosure [Abstract]
Contractual interest expense	$ 3,174	$ 4,799	$ 6,322	$ 7,430
Interest cost related to amortization of debt discount	101	13,665	202	27,620
Interest cost related to amortization of debt issuance costs	896	863	1,792	1,750
Total interest expense	$ 4,171	$ 19,327	$ 8,316	$ 36,800

X

- Definition

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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- Definition

Amount of amortization expense attributable to debt issuance costs.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings, excluding amortization of debt discount (premium) and financing costs.

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