CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2024	Jul. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 219,015	$ 181,974	$ 435,323	$ 197,418
Other comprehensive income (loss):
Unrealized gain (loss) on available-for-sale marketable securities, net of income tax (expense) benefit of $(6,038) and $553 for the three months ended July 31, 2024 and 2023, respectively, and $(346) and $(4,121) for the six months ended July 31, 2024 and 2023, respectively	19,681	(1,836)	1,128	13,678
Comprehensive income	$ 238,696	$ 180,138	$ 436,451	$ 211,096