v3.26.3
Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($)
$ in Thousands
 12 Months Ended
May 31, 2026
May 31, 2025
May 31, 2024
Segment Reporting Information [Line Items]      
Net revenues $ 5,661,294 $ 4,900,262 $ 4,313,586
Operating cost and expenses:      
Cost of revenues (2,568,167) (2,183,291) (2,050,960)
Selling and marketing (855,864) (783,959) (660,586)
General and administrative (1,594,012) (1,444,463) (1,251,615)
Unallocated corporate expenses (5,018,043) (4,472,012) (3,963,161)
Segment operating income/(loss) 643,251 428,250 350,425
Unallocated items 69,521 93,877 84,483
Total assets 8,792,020 7,805,499 7,531,673
Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Net revenues 5,661,294 4,900,262 4,313,586
Operating cost and expenses:      
Cost of revenues (2,568,167) (2,183,291) (2,050,960)
Selling and marketing (832,524) (760,279) (643,746)
General and administrative (1,268,439) (1,164,724) (965,561)
Segment operating income/(loss) 643,251 428,250 350,425
Unallocated items 69,521 93,877 84,483
Income before income taxes 712,772 522,127 434,908
Total assets 4,542,232 4,102,001 3,654,992
Corporate, Non-Segment [Member]      
Operating cost and expenses:      
Unallocated corporate expenses (348,913) (363,718) (302,894)
Total assets 4,249,788 3,703,498 3,876,681
Educational Services and Test Preparation Courses [Member]      
Operating cost and expenses:      
Total assets 2,979,430 2,682,938 2,217,342
Educational Services and Test Preparation Courses [Member] | Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Net revenues 4,006,764 3,456,189 2,716,174
Operating cost and expenses:      
Cost of revenues (1,570,207) (1,319,315) (1,027,889)
Selling and marketing (450,251) (414,669) (348,121)
General and administrative (1,048,565) (913,775) (755,074)
Segment operating income/(loss) 937,741 808,430 585,090
Total assets 2,979,430 2,682,938 2,217,342
Private label products and livestreaming e-commerce and other services [Member]      
Operating cost and expenses:      
Total assets 1,028,683 846,535 831,620
Private label products and livestreaming e-commerce and other services [Member] | Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Net revenues 806,912 600,281 900,614
Operating cost and expenses:      
Cost of revenues (522,675) (410,377) (677,270)
Selling and marketing (153,593) (121,421) (124,975)
General and administrative (43,051) (78,778) (77,626)
Segment operating income/(loss) 87,593 (10,295) 20,743
Total assets 1,028,683 846,535 831,620
Overseas Study Consulting Services [Member]      
Operating cost and expenses:      
Total assets 140,666 125,030 119,725
Overseas Study Consulting Services [Member] | Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Net revenues 511,346 516,367 439,744
Operating cost and expenses:      
Cost of revenues (255,699) (251,782) (214,602)
Selling and marketing (111,023) (103,015) (92,865)
General and administrative (79,190) (79,071) (57,204)
Segment operating income/(loss) 65,434 82,499 75,073
Total assets 140,666 125,030 119,725
Others [Member]      
Operating cost and expenses:      
Total assets 393,453 447,498 486,305
Others [Member] | Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Net revenues 336,272 327,425 257,054
Operating cost and expenses:      
Cost of revenues (219,586) (201,817) (131,199)
Selling and marketing (117,657) (121,174) (77,785)
General and administrative (97,633) (93,100) (75,657)
Segment operating income/(loss) (98,604) (88,666) (27,587)
Total assets $ 393,453 $ 447,498 $ 486,305