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Other Events (Details) $ / shares in Units, $ in Thousands, $ in Millions		1 Months Ended		3 Months Ended
	Dec. 04, 2020 USD ($) $ / shares	Apr. 30, 2019 MXN ($)	Jul. 31, 2018 MXN ($)	Jan. 31, 2021 USD ($)	Jan. 31, 2020 USD ($)
Dividend declared per share | $ / shares	$ 1.15
Dividend amount paid to shareholders | $	$ 20,300			$ 20,343	$ 19,354
Mexican Tax Authority [Member]
Employee profit sharing liability			$ 118	5,800
Tax Year 2011 [Member] | Mexican Tax Authority [Member]
Discreet tax benefit		$ 2,200		108,800
Tax Year 2013 [Member] | Mexican Tax Authority [Member]
Discreet tax benefit			$ 2,600	$ 128,600

X

- Definition

Aggregate dividends paid during the period for each share of common stock outstanding.

+ References

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-Publisher FASB
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- Definition

The amount of the additional liability or refund received or expected based on a final settlement with a taxing authority.

+ References

No definition available.

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- Definition

Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

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Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement.

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