CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 1,900,148	$ 1,010,238	$ 637,462
Other comprehensive income:
Unrealized gain on available-for-sale marketable securities, net of income tax expense of $1,154, $1,205, and $15,501 during the fiscal years ended January 31, 2026, 2025 and 2024, respectively	3,554	3,927	51,448
Comprehensive income	$ 1,903,702	$ 1,014,165	$ 688,910