CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2026	Jul. 31, 2025	Jul. 31, 2026	Jul. 31, 2025
Statement of Comprehensive Income [Abstract]
Net income	$ 1,542,445	$ 358,592	$ 1,968,122	$ 613,195
Other comprehensive loss:
Unrealized loss on available-for-sale marketable securities, net of income tax benefit of $7,422 and $4,804 for the three months ended July 31, 2026 and 2025, respectively, and $12,831 and $1,681 for the six months ended July 31, 2026 and 2025, respectively	(22,876)	(15,622)	(39,549)	(5,467)
Comprehensive income	$ 1,519,569	$ 342,970	$ 1,928,573	$ 607,728