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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid in Capital
Accumulated Other Comprehensive Loss
Retained Earnings
Beginning balance (in shares) at Feb. 28, 2021   24,406      
Beginning balance at Feb. 28, 2021 $ 1,239,347 $ 2,441 $ 283,396 $ (11,656) $ 965,166
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income 56,972       56,972
Other comprehensive income (loss), net of tax (797)     (797)  
Exercise of stock options (in shares)   4      
Exercise of stock options 275   275    
Issuance and settlement of restricted stock (in shares)   177      
Issuance and settlement of restricted stock 0 $ 18 (18)    
Issuance of common stock related to stock purchase plan (in shares)   13      
Issuance of common stock related to stock purchase plan 2,338 $ 1 2,337    
Common stock repurchased and retired (in shares)   (502)      
Common stock repurchased and retired (110,074) $ (50) (16,616)   (93,408)
Share-based compensation 14,020   14,020    
Ending balance (in shares) at May. 31, 2021   24,098      
Ending balance at May. 31, 2021 1,202,081 $ 2,410 283,394 (12,453) 928,730
Beginning balance (in shares) at Feb. 28, 2021   24,406      
Beginning balance at Feb. 28, 2021 1,239,347 $ 2,441 283,396 (11,656) 965,166
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Other comprehensive income (loss), net of tax 10,590        
Ending balance (in shares) at Nov. 30, 2021   24,136      
Ending balance at Nov. 30, 2021 1,354,958 $ 2,414 298,708 (1,066) 1,054,902
Beginning balance (in shares) at May. 31, 2021   24,098      
Beginning balance at May. 31, 2021 1,202,081 $ 2,410 283,394 (12,453) 928,730
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income 51,315       51,315
Other comprehensive income (loss), net of tax 6,242     6,242  
Exercise of stock options (in shares)   6      
Exercise of stock options 520 $ 1 519    
Issuance and settlement of restricted stock (in shares)   2      
Common stock repurchased and retired (in shares)   (1)      
Common stock repurchased and retired (116)   (104)   (12)
Share-based compensation 7,780   7,780    
Ending balance (in shares) at Aug. 31, 2021   24,105      
Ending balance at Aug. 31, 2021 1,267,822 $ 2,411 291,589 (6,211) 980,033
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income 75,683       75,683
Other comprehensive income (loss), net of tax 5,145     5,145  
Exercise of stock options (in shares)   11      
Exercise of stock options 665   664    
Issuance and settlement of restricted stock (in shares)   22      
Issuance and settlement of restricted stock 0 $ 2 (2)    
Issuance of common stock related to stock purchase plan (in shares)   10      
Issuance of common stock related to stock purchase plan 1,923 $ 1 1,922    
Common stock repurchased and retired (in shares)   (12)      
Common stock repurchased and retired (2,829) $ (1) (2,014)   (814)
Share-based compensation 6,549   6,549    
Ending balance (in shares) at Nov. 30, 2021   24,136      
Ending balance at Nov. 30, 2021 1,354,958 $ 2,414 298,708 (1,066) 1,054,902
Beginning balance (in shares) at Feb. 28, 2022   23,800      
Beginning balance at Feb. 28, 2022 1,327,339 $ 2,380 303,740 202 1,021,017
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income 24,595       24,595
Other comprehensive income (loss), net of tax 3,159     3,159  
Exercise of stock options (in shares)   8      
Exercise of stock options 659 $ 1 658    
Issuance and settlement of restricted stock (in shares)   235      
Issuance and settlement of restricted stock 0 $ 24 (24)    
Issuance of common stock related to stock purchase plan (in shares)   13      
Issuance of common stock related to stock purchase plan 2,275 $ 1 2,274    
Common stock repurchased and retired (in shares)   (89)      
Common stock repurchased and retired (18,224) $ (9) (18,113)   (102)
Share-based compensation 16,619   16,619    
Ending balance (in shares) at May. 31, 2022   23,967      
Ending balance at May. 31, 2022 1,356,422 $ 2,397 305,154 3,361 1,045,510
Beginning balance (in shares) at Feb. 28, 2022   23,800      
Beginning balance at Feb. 28, 2022 1,327,339 $ 2,380 303,740 202 1,021,017
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Other comprehensive income (loss), net of tax 3,937        
Ending balance (in shares) at Nov. 30, 2022   23,991      
Ending balance at Nov. 30, 2022 1,457,073 $ 2,399 322,527 4,139 1,128,008
Beginning balance (in shares) at May. 31, 2022   23,967      
Beginning balance at May. 31, 2022 1,356,422 $ 2,397 305,154 3,361 1,045,510
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income 30,672       30,672
Other comprehensive income (loss), net of tax 3,839     3,839  
Issuance and settlement of restricted stock (in shares)   2      
Issuance and settlement of restricted stock (1)   (1)    
Common stock repurchased and retired (81)   (81)    
Share-based compensation 7,495   7,495    
Ending balance (in shares) at Aug. 31, 2022   23,969      
Ending balance at Aug. 31, 2022 1,398,346 $ 2,397 312,567 7,200 1,076,182
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income 51,826       51,826
Other comprehensive income (loss), net of tax (3,061)     (3,061)  
Issuance and settlement of restricted stock (in shares)   3      
Issuance and settlement of restricted stock 0 $ 0 0    
Issuance of common stock related to stock purchase plan (in shares)   20      
Issuance of common stock related to stock purchase plan 2,066 $ 2 2,064    
Common stock repurchased and retired (in shares)   (1)      
Common stock repurchased and retired (45) $ 0 (45)   0
Share-based compensation 7,941   7,941    
Ending balance (in shares) at Nov. 30, 2022   23,991      
Ending balance at Nov. 30, 2022 $ 1,457,073 $ 2,399 $ 322,527 $ 4,139 $ 1,128,008