v3.26.1
Schedule I Condensed Financial Information of Parent Company - Statements of Cash Flow (Details) - USD ($)
$ in Thousands
 12 Months Ended
Feb. 28, 2026
Feb. 28, 2025
Feb. 29, 2024
Statements of Cash Flow      
Net cash provided by / (used in) operating activities $ 601,467 $ 397,923 $ 306,172
Cash flows from investing activities      
Purchase of short-term investments (1,956,921) (2,083,382) (670,573)
Proceeds from maturity of short-term investments 2,368,506 1,428,252 992,603
Payments for long-term investments (406,841) (101,788) (194,159)
Proceeds from disposal of long-term investments 6,929 21,041 75,635
Net cash provided by / (used in) investing activities (175,746) (847,028) 95,068
Cash flows from financing activities      
Proceeds from exercise of share options 573 407 462
Share repurchase (644,085) (13,147) (233,557)
Net cash used in financing activities (643,512) (13,167) (233,095)
Net increase / (decrease) in cash, cash equivalents and restricted cash (205,693) (465,745) 162,569
Cash, cash equivalents and restricted cash at the beginning of year 1,991,731 2,457,476 2,294,907
Cash, cash equivalents and restricted cash at the end of year 1,786,038 1,991,731 2,457,476
Parent Company      
Statements of Cash Flow      
Net cash provided by / (used in) operating activities (48,805) 95,118 78,285
Cash flows from investing activities      
Loan to group subsidiaries (232,100) (88,388)  
Repayment of loan to subsidiaries   328,669  
Purchase of short-term investments (1,304,253) (1,531,100) (447,680)
Proceeds from maturity of short-term investments 1,797,086 1,040,846 718,066
Payments for long-term investments (175,026) (99,055) (119,336)
Proceeds from disposal of long-term investments 5,608 865 46,939
Investment in subsidiaries   (16,721) (60,544)
Net cash provided by / (used in) investing activities 91,315 (364,884) 137,445
Cash flows from financing activities      
Proceeds from exercise of share options 573 407 462
Share repurchase (644,085) (13,147) (233,557)
Net cash used in financing activities (643,512) (12,740) (233,095)
Net increase / (decrease) in cash, cash equivalents and restricted cash (601,002) (282,506) (17,365)
Cash, cash equivalents and restricted cash at the beginning of year 1,036,364 1,318,870 1,336,235
Cash, cash equivalents and restricted cash at the end of year $ 435,362 $ 1,036,364 $ 1,318,870