Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-in Capital
Treasury Stock at Cost
Retained Earnings (Accumulated Deficit)
Accumulated Other Comprehensive Income (Loss)
Beginning Balance (in shares) at Dec. 31, 2016   16,897        
Beginning Balance at Dec. 31, 2016 $ 372,712 $ 53 $ 855,344 $ (252,981) $ (229,715) $ 11
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 150,603       150,603  
Unrealized loss on investments (5)         (5)
Issuance of shares for performance-based awards (in shares)   22        
Stock-based compensation expense $ 40,829   40,829      
Exercise of stock options (in shares) 1,612 1,612        
Exercise of stock options $ 63,119 $ 1 63,118      
Shares issued under the Employee Stock Purchase Plan (in shares)   36        
Shares issued under the Employee Stock Purchase Plan $ 2,937 $ 1 2,936      
Stock repurchase, excluding tax withholding stock repurchase (in shares) (988) (987)        
Stock repurchase, excluding tax withholding stock repurchase $ (133,765)     (133,765)    
Tax withholding stock repurchase (in shares)   (7)        
Tax withholding stock repurchase (799)     (799)    
Ending Balance (in shares) at Dec. 31, 2017   17,573        
Ending Balance at Dec. 31, 2017 497,813 $ 55 962,227 (387,545) (76,930) 6
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 168,642       168,642  
Other comprehensive income (loss) 751         751
Unrealized loss on investments (2)          
Issuance of shares for performance-based awards (in shares)   57        
Stock-based compensation expense $ 36,349   36,349      
Exercise of stock options (in shares) 784 783        
Exercise of stock options $ 47,338 $ 1 47,337      
Shares issued under the Employee Stock Purchase Plan (in shares)   25        
Shares issued under the Employee Stock Purchase Plan $ 3,756 $ 0 3,756      
Stock repurchase, excluding tax withholding stock repurchase (in shares) (755) (755)        
Stock repurchase, excluding tax withholding stock repurchase $ (136,840)     (136,840)    
Tax withholding stock repurchase (in shares)   (21)        
Tax withholding stock repurchase $ (4,144)     (4,144)    
Ending Balance (in shares) at Dec. 31, 2018 17,662 17,662        
Ending Balance at Dec. 31, 2018 $ 613,665 $ 56 1,049,669 (528,529) 91,712 757
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 59,229       59,229  
Other comprehensive income (loss) 8,956         8,956
Unrealized loss on investments (4)          
Issuance of shares for performance-based awards (in shares)   4        
Stock-based compensation expense $ 42,891   42,891      
Exercise of stock options (in shares) 53 53        
Exercise of stock options $ 3,049 $ 0 3,049      
Shares issued under the Employee Stock Purchase Plan (in shares)   31        
Shares issued under the Employee Stock Purchase Plan $ 2,817   2,817      
Stock repurchase, excluding tax withholding stock repurchase (in shares) (720) (720)        
Stock repurchase, excluding tax withholding stock repurchase $ (64,889)     (64,889)    
Tax withholding stock repurchase (in shares)   (1)        
Tax withholding stock repurchase $ (93)     (93)    
Ending Balance (in shares) at Dec. 31, 2019 17,029 17,029        
Ending Balance at Dec. 31, 2019 $ 665,625 $ 56 $ 1,098,426 $ (593,511) $ 150,941 $ 9,713