Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021
Income Tax Disclosure [Abstract]
Income before provision for income taxes	$ 54,749	$ 410,283	$ 288,820	$ 963,098
Provision for income taxes	$ 6,396	$ 69,900	$ 81,059	$ 78,100
Effective tax rate	11.70%	17.00%	28.10%	8.10%