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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Jan. 31, 2024
Jan. 31, 2023
Jan. 31, 2022
CONSOLIDATED STATEMENTS OF OPERATIONS      
REVENUES $ 572,931 $ 486,014 $ 424,690
COST OF REVENUES (exclusive of amortization presented separately below) 138,295 113,326 101,810
GROSS MARGIN 434,636 372,688 322,880
EXPENSES      
Sales and marketing 68,161 56,573 46,895
Research and development 84,103 70,353 62,570
General and administrative 57,373 49,710 44,454
Other charges (Note 19) 21,649 5,441 6,428
Amortization of intangible assets 60,501 60,177 59,099
TOTAL EXPENSES 291,787 242,254 219,446
INCOME FROM OPERATIONS 142,849 130,434 103,434
INTEREST EXPENSE (1,363) (1,167) (1,123)
INVESTMENT AND OTHER INCOME 9,666 4,461 299
INCOME BEFORE INCOME TAXES 151,152 133,728 102,610
INCOME TAX EXPENSE (Note 17)      
Current 41,223 28,248 14,814
Deferred (5,978) 3,244 1,514
TOTAL INCOME TAX EXPENSE 35,245 31,492 16,328
NET INCOME $ 115,907 $ 102,236 $ 86,282
EARNINGS PER SHARE (Note 15)      
Basic (in $ per share) $ 1.36 $ 1.21 $ 1.02
Diluted (in $ per share) $ 1.34 $ 1.18 $ 1.00
WEIGHTED AVERAGE SHARES OUTSTANDING (thousands)      
Basic (in shares) 85,068 84,791 84,591
Diluted (in shares) 86,818 86,451 86,200