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Consolidated Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid in Capital
Accumulated Other Comprehensive Income (Loss)
Retained Earnings
Balance (in shares) at Feb. 28, 2017   27,029      
Beginning Balance at Feb. 28, 2017 $ 1,020,766 $ 2,703 $ 218,760 $ 1,173 $ 798,130
Increase (Decrease) in Stockholders' Equity          
Income from continuing operations 128,882       128,882
Loss from discontinued operations (84,436)       (84,436)
Other comprehensive income (loss), net of tax (542)     (542)  
Exercise of stock options, net (in shares)   126      
Exercise of stock options 6,559 $ 12 6,547    
Issuance of restricted stock (in shares)   198      
Net issuance and settlement of restricted stock (298) $ 20 (318)    
Issuance of common stock related to employee stock purchase plan (in shares)   16      
Issuance of common stock related to stock purchase plan 1,527 $ 2 1,525    
Common stock repurchased and retired (in shares)   (793)      
Common stock repurchased and retired (73,053) $ (79) (10,892)   (62,082)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition 15,054   15,054    
Balance (in shares) at Feb. 28, 2018   26,576      
Ending Balance at Feb. 28, 2018 1,014,459 $ 2,658 230,676 631 780,494
Increase (Decrease) in Stockholders' Equity          
Income from continuing operations 174,224       174,224
Loss from discontinued operations (5,679)       (5,679)
Other comprehensive income (loss), net of tax 560     560  
Exercise of stock options, net (in shares)   126      
Exercise of stock options 6,275 $ 13 6,262    
Issuance of restricted stock (in shares)   147      
Net issuance and settlement of restricted stock 0 $ 15 (15)    
Issuance of common stock related to employee stock purchase plan (in shares)   31      
Issuance of common stock related to stock purchase plan 2,395 $ 3 2,392    
Common stock repurchased and retired (in shares)   (1,934)      
Common stock repurchased and retired (217,493) $ (194) (14,783)   (202,516)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition 22,053   22,053    
Balance (in shares) at Feb. 28, 2019   24,946      
Ending Balance at Feb. 28, 2019 996,637 $ 2,495 246,585 1,191 746,366
Increase (Decrease) in Stockholders' Equity          
Income from continuing operations 152,333       152,333
Loss from discontinued operations 0       0
Other comprehensive income (loss), net of tax (8,196)     (8,196)  
Exercise of stock options, net (in shares)   93      
Exercise of stock options 5,353 $ 9 5,344    
Issuance of restricted stock (in shares)   202      
Net issuance and settlement of restricted stock 0 $ 20 (20)    
Issuance of common stock related to employee stock purchase plan (in shares)   30      
Issuance of common stock related to stock purchase plan 2,836 $ 3 2,833    
Common stock repurchased and retired (in shares)   (77)      
Common stock repurchased and retired (10,169) $ (8) (9,628)   (533)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition 22,929   22,929    
Balance (in shares) at Feb. 29, 2020   25,194      
Ending Balance at Feb. 29, 2020 $ 1,161,723 $ 2,519 $ 268,043 $ (7,005) $ 898,166