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SIGNIFICANT ACCOUNTING POLICIES - Disaggregation of net revenues (Details) - USD ($)
$ in Thousands
12 Months Ended
Feb. 28, 2022
Feb. 28, 2021
Feb. 29, 2020
Disaggregation of Revenue [Line Items]      
Revenues $ 4,390,907 $ 4,495,755 $ 3,273,308
Small class learning services, personalized premium services and others      
Disaggregation of Revenue [Line Items]      
Revenues 3,054,731 3,221,161 2,655,323
Online education services through www.xueersi.com      
Disaggregation of Revenue [Line Items]      
Revenues $ 1,336,176 $ 1,274,594 $ 617,985