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Derivative financial instruments - Outstanding Currency, Forward Exchange Contracts (Detail) - Foreign Currency Forward Contracts - Notional Sell Amounts - USD ($) $ in Thousands | Jan. 31, 2023 | Jan. 31, 2022
--- | --- | ---
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | $ 152,604 | $ 166,300
Euro |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 93,142 | 102,132
British pound |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 27,965 | 34,657
Mexican Peso |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 11,658 |
Japanese yen |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 11,644 | 12,315
Hong Kong dollar |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 4,180 | 0
Australian dollar |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 375 | 325
Singapore dollar |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 245 | 1,079
Taiwan Dollar |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 0 |
Others |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 3,395 | 15,792
Notional Amounts of foreign currency derivative contracts | 855,150 | 614,920
Euro |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 398,560 | 338,128
British pound |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 112,945 | 70,869
Mexican Peso |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 31,315 |
Japanese yen |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 35,772 | 40,384
Hong Kong dollar |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 148,653 | 49,595
Australian dollar |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 8,821 | 10,026
Singapore dollar |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 18,862 | 18,214
Taiwan Dollar |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | 35,047 |
Others |  |
Derivative [Line Items] |  |
Notional Amounts of foreign currency derivative contracts | $ 65,175 | $ 87,704

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