CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2024	Oct. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 207,050	$ 141,212	$ 642,373	$ 338,630
Other comprehensive income:
Unrealized gain on available-for-sale marketable securities, net of income tax expense of $1,410 and $2,892 for the three months ended October 31, 2024 and 2023, respectively, and $1,756 and $7,013 for the nine months ended October 31, 2024 and 2023, respectively	4,596	9,598	5,724	23,276
Comprehensive income	$ 211,646	$ 150,810	$ 648,097	$ 361,906