Investments - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Fair Value, Separate Account Investment [Line Items]
Unrealized losses for securities in unrealized loss position for less than 12 months	$ 1,500	$ 6,200
Available-for-sale, realized gain (loss)	0	0	$ 0
Purchase of strategic investments in equity securities	98,245	$ 18,500	$ 70,527
Strategic investments in equity securities sold	75,600
Equity Securities Without Readily Determinable Fair Value
Fair Value, Separate Account Investment [Line Items]
Purchase of strategic investments in equity securities	70,700
Net unrealized gains on strategic investments	$ 951,700

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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