Acquisitions - Schedule of Pro Forma Information (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2021 USD ($) $ / shares
Business Combination and Asset Acquisition [Abstract]
Pro forma revenues | $	$ 1,153,497
Pro forma net income | $	$ 278,215
Pro forma net income per share:
Basic (in dollars per share) | $ / shares	$ 1.88
Diluted (in dollars per share) | $ / shares	$ 1.76