CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 612,873	$ 207,050	$ 1,226,068	$ 642,373
Other comprehensive income:
Unrealized gain on available-for-sale marketable securities, net of income tax expense of $3,333 and $1,410 for the three months ended October 31, 2025 and 2024, respectively, and $1,652 and $1,756 for the nine months ended October 31, 2025 and 2024, respectively	10,840	4,596	5,373	5,724
Comprehensive income	$ 623,713	$ 211,646	$ 1,231,441	$ 648,097