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Other Income (Expense), Net (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Other Income and Expenses [Abstract]
Interest income	$ 11,239	$ 14,692	$ 21,589	$ 26,928
Interest expense	(14,473)	(17,515)	(26,074)	(35,817)
Other	3,128	4,436	11,520	6,654
Other income (expense), net	$ (106)	$ 1,613	$ 7,035	$ (2,235)

X

- Definition

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

+ References

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X

- Definition

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

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- Definition

The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

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- Definition

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

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