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Other Income (Expense), Net (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Other Income and Expenses [Abstract]
Interest income	$ 6,995	$ 6,394	$ 33,923	$ 15,474
Interest expense	(12,348)	(12,285)	(48,165)	(26,111)
Other	31,970	2,149	38,624	6,170
Other income (expense), net	$ 26,617	$ (3,742)	$ 24,382	$ (4,467)

X

- Definition

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

+ References

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- Definition

Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.

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- Definition

Amount of income (expense) related to nonoperating activities, classified as other.

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Other Income (Expense)

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No definition available.

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