Derivative Financial Instruments - Outstanding Currency, Forward Exchange Contracts (Detail) - Foreign Currency Forward Contracts - USD ($) $ in Thousands	Jan. 31, 2022	Jan. 31, 2021
Sell
Derivative [Line Items]
Notional Amounts of foreign currency derivative contracts	$ 166,300	$ 238,626
Buy
Derivative [Line Items]
Notional Amounts of foreign currency derivative contracts	614,920	569,636
Euro | Sell
Derivative [Line Items]
Notional Amounts of foreign currency derivative contracts	102,132	122,414
Euro | Buy
Derivative [Line Items]
Notional Amounts of foreign currency derivative contracts	338,128	270,516
British pound | Sell
Derivative [Line Items]
Notional Amounts of foreign currency derivative contracts	34,657	20,206
British pound | Buy
Derivative [Line Items]
Notional Amounts of foreign currency derivative contracts	70,869	60,579
Japanese yen | Sell
Derivative [Line Items]
Notional Amounts of foreign currency derivative contracts	12,315	25,011
Japanese yen | Buy
Derivative [Line Items]
Notional Amounts of foreign currency derivative contracts	40,384	42,370
Australian dollar | Sell
Derivative [Line Items]
Notional Amounts of foreign currency derivative contracts	325	193
Australian dollar | Buy
Derivative [Line Items]
Notional Amounts of foreign currency derivative contracts	10,026	9,255
Hong Kong dollar | Sell
Derivative [Line Items]
Notional Amounts of foreign currency derivative contracts	0	60,949
Hong Kong dollar | Buy
Derivative [Line Items]
Notional Amounts of foreign currency derivative contracts	49,595	88,915
Singapore dollar | Sell
Derivative [Line Items]
Notional Amounts of foreign currency derivative contracts	1,079	204
Singapore dollar | Buy
Derivative [Line Items]
Notional Amounts of foreign currency derivative contracts	18,214	16,983
Others | Sell
Derivative [Line Items]
Notional Amounts of foreign currency derivative contracts	15,792	9,649
Others | Buy
Derivative [Line Items]
Notional Amounts of foreign currency derivative contracts	$ 87,704	$ 81,018