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Unaudited Condensed Consolidated Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Class A Common Stock
Class C Common Stock
Common Stock
Class A Common Stock
Common Stock
Class B Convertible Common Stock
Common Stock
Class C Common Stock
Additional Paid-in Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Beginning balance (shares) at Dec. 31, 2019       188,290 34,450 229,028      
Beginning balance at Dec. 31, 2019 $ 2,150,087     $ 62 $ 11 $ 76 $ 973,717 $ 1,226,986 $ (50,765)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Exercise of stock options (shares)       147   135      
Exercise of stock options 517           517    
Shares withheld in consideration of employee tax obligations relative to stock-based compensation arrangements (shares)       (1)   (233)      
Shares withheld in consideration of employee tax obligations relative to stock-based compensation arrangements (3,285)             (3,285)  
Issuance of common stock, net of forfeitures (shares)       98   2,755      
Issuance of common stock, net of forfeitures     $ 3,638     $ 1 3,637    
Stock-based compensation expense 32,770           32,770    
Equity Component value of convertible note issuance, net 40,342           40,342    
Comprehensive income (loss) (753,723)             (733,630) (20,093)
Ending balance (shares) at Sep. 30, 2020       188,534 34,450 231,685      
Ending balance at Sep. 30, 2020 1,470,346     $ 62 $ 11 $ 77 1,050,983 490,071 (70,858)
Beginning balance (shares) at Jun. 30, 2020       188,461 34,450 231,354      
Beginning balance at Jun. 30, 2020 1,423,414     $ 62 $ 11 $ 77 1,044,055 450,750 (71,541)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Exercise of stock options (shares)       2   2      
Exercise of stock options 18           18    
Shares withheld in consideration of employee tax obligations relative to stock-based compensation arrangements (shares)           (57)      
Shares withheld in consideration of employee tax obligations relative to stock-based compensation arrangements 375             375  
Issuance of common stock, net of forfeitures (shares)       71   386      
Issuance of common stock, net of forfeitures     978       978    
Stock-based compensation expense 9,513           9,513    
Equity Component value of convertible note issuance, net (3,581)           (3,581)    
Comprehensive income (loss) 39,629             38,946 683
Ending balance (shares) at Sep. 30, 2020       188,534 34,450 231,685      
Ending balance at Sep. 30, 2020 1,470,346     $ 62 $ 11 $ 77 1,050,983 490,071 (70,858)
Beginning balance (shares) at Dec. 31, 2020       188,603 34,450 231,954      
Beginning balance at Dec. 31, 2020 1,675,993     $ 62 $ 11 $ 77 1,061,173 673,855 (59,185)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Exercise of stock options (shares)       6   7      
Exercise of stock options 24           23    
Shares withheld in consideration of employee tax obligations relative to stock-based compensation arrangements (shares)           (291)      
Shares withheld in consideration of employee tax obligations relative to stock-based compensation arrangements (5,594)             (5,594)  
Issuance of common stock, net of forfeitures (shares)       36   21,322      
Issuance of common stock, net of forfeitures 2,715 $ 0       $ 7 2,708    
Stock-based compensation expense 32,952           32,952    
Comprehensive income (loss) 271,659             250,403 21,256
Ending balance (shares) at Sep. 30, 2021       188,645 34,450 252,992      
Ending balance at Sep. 30, 2021 1,977,749     $ 63 $ 11 $ 84 1,096,856 918,664 (37,929)
Beginning balance (shares) at Jun. 30, 2021       188,625 34,450 245,144      
Beginning balance at Jun. 30, 2021 1,846,710     $ 63 $ 11 $ 81 1,084,018 806,140 (43,603)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Shares withheld in consideration of employee tax obligations relative to stock-based compensation arrangements (shares)           (52)      
Shares withheld in consideration of employee tax obligations relative to stock-based compensation arrangements (920)             (920)  
Issuance of common stock, net of forfeitures (shares)       20   7,900      
Issuance of common stock, net of forfeitures   $ 0 $ 1,793     $ 3 1,790    
Stock-based compensation expense 11,048           11,048    
Comprehensive income (loss) 119,118             113,444 5,674
Ending balance (shares) at Sep. 30, 2021       188,645 34,450 252,992      
Ending balance at Sep. 30, 2021 $ 1,977,749     $ 63 $ 11 $ 84 $ 1,096,856 $ 918,664 $ (37,929)