Net Income Per Share Attributable to Common Stockholders - Narrative (Details) - Class A Common Stock - shares	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Issuance of common stock reserved for charitable donation (in shares)	1,256,967	165,336	1,929,417
Shares Reserved For Transfer To Nonprofit Organizations
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Issuance of common stock reserved for charitable donation (in shares)	405,156	405,156	500,000