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Consolidated Statements of Equity - USD ($)
shares in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Balance at Dec. 31, 2018 $ 3,087,884,000 $ 878,000 $ 992,647,000 $ 2,094,359,000
Balance, Shares at Dec. 31, 2018   87,820    
Net Income (loss) (1,497,702,000)     (1,497,702,000)
Net Income (Loss) Attributable to Noncontrolling Interest      
Unrealized holding gain on investments, net of tax [1] 78,000     78,000
Common stock issued under employee stock option, employee stock purchase plan and stock purchase plan 11,947,000 $ 5,000 11,942,000  
Common stock issued under employee stock option, employee stock purchase plan and stock purchase plan, shares   533    
Issuance of restricted stock and conversion of restricted stock units to common stock   $ 11,000 (11,000)  
Issuance of restricted stock and conversion of restricted stock units to common stock, shares   1,113    
Issuance of restricted stock   1,113    
Issuance of restricted stock Value   $ 11,000 (11,000)  
Stock-based compensation expense 42,758,000   42,758,000  
Stock swaps (689,000)   (689,000)  
Stock swaps, shares   (20)    
Forfeitures of restricted stock   $ 1,000 (1,000)  
Forfeitures of restricted stock, shares   (132)    
Repurchased common stock (145,280,000) $ (51,000) (58,706,000) (86,523,000)
Repurchased common stock, shares   (5,066)    
Balance at Dec. 31, 2019 1,498,996,000 $ 842,000 987,942,000 510,212,000
Balance, Shares at Dec. 31, 2019   84,248    
Net Income (loss) (796,488,000)     (796,488,000)
Net Income (Loss) Attributable to Noncontrolling Interest      
Contribution from noncontrolling Interests, net of loss [1] 232,000     232,000
Unrealized holding gain on investments, net of tax [1] 3,452,000     3,452,000
Common stock issued under employee stock option, employee stock purchase plan and stock purchase plan 7,009,000 $ 5,000 7,004,000  
Common stock issued under employee stock option, employee stock purchase plan and stock purchase plan, shares   538    
Issuance of restricted stock and conversion of restricted stock units to common stock   $ 15,000 (15,000)  
Issuance of restricted stock and conversion of restricted stock units to common stock, shares   1,450    
Issuance of restricted stock   1,450    
Issuance of restricted stock Value   $ 15,000 (15,000)  
Stock-based compensation expense 43,009,000   43,009,000  
Forfeitures of restricted stock   $ 2,000 (2,000)  
Forfeitures of restricted stock, shares   (173)    
Repurchased common stock (8,493,000) $ (4,000) (8,489,000)  
Repurchased common stock, shares   (470)    
Balance at Dec. 31, 2020 747,717,000 $ 856,000 1,029,453,000 (282,592,000)
Balance, Shares at Dec. 31, 2020   85,593    
Net Income (loss) 130,964,000     130,964,000
Net Income (Loss) Attributable to Noncontrolling Interest 27,000     27,000 [1]
Unrealized holding gain on investments, net of tax [1] 2,213,000     (2,213,000)
Common stock issued under employee stock option, employee stock purchase plan and stock purchase plan 6,852,000 $ 3,000 6,849,000  
Common stock issued under employee stock option, employee stock purchase plan and stock purchase plan, shares   321    
Issuance of restricted stock and conversion of restricted stock units to common stock   $ 7,000 (7,000)  
Issuance of restricted stock and conversion of restricted stock units to common stock, shares   736    
Issuance of restricted stock   736    
Issuance of restricted stock Value   $ 7,000 (7,000)  
Stock-based compensation expense 18,118,000   18,118,000  
Forfeitures of restricted stock, shares   (55)    
Repurchased common stock (4,719,000) $ (2,000) (4,717,000)  
Repurchased common stock, shares   (172)    
Balance at Dec. 31, 2021 $ 896,692,000 $ 864,000 $ 1,049,696,000 $ 153,868,000
Balance, Shares at Dec. 31, 2021   86,423    
[1] Presented within retained (deficit) earnings as the balance is immaterial.