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Consolidated Statements of Equity - USD ($)
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Balance at Dec. 31, 2019 $ 1,498,996,000 $ 842,000 $ 987,942,000 $ 510,212,000
Balance, Shares at Dec. 31, 2019   84,248,000    
Net Income (loss) (796,488,000)     (796,488,000)
Net loss attributable to noncontrolling interest 0      
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   538,000    
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   1,450,000    
Issuance of restricted stock   1,450,000    
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   (173,000)    
Repurchased common stock (8,493,000) $ (4,000) (8,489,000)  
Repurchased common stock, shares   (470,000)    
Balance at Dec. 31, 2020 747,717,000 $ 856,000 1,029,453,000 (282,592,000)
Balance, Shares at Dec. 31, 2020   85,593,000    
Net Income (loss) 130,964,000     130,964,000
Net 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   321,000    
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   736,000    
Issuance of restricted stock   736,000    
Issuance of restricted stock Value   $ 7,000 (7,000)  
Stock-based compensation expense 18,118,000   18,118,000  
Forfeitures of restricted stock, shares   (55,000)    
Repurchased common stock (4,719,000) $ (2,000) (4,717,000)  
Repurchased common stock, shares   (172,000)    
Balance at Dec. 31, 2021 896,692,000 $ 864,000 1,049,696,000 (153,868,000)
Balance, Shares at Dec. 31, 2021   86,423,000    
Net Income (loss) 66,335,000     66,335,000
Net loss attributable to noncontrolling interest (4,000)      
Dissolution Of And Net Income (Loss) Attributable to Noncontrolling Interest (206,000)   8,000 (214,000)
Unrealized holding gain on investments, net of tax (5,051,000)     (5,051,000)
Common stock issued under employee stock option, employee stock purchase plan and stock purchase plan 5,396,000 $ 3,000 5,393,000  
Common stock issued under employee stock option, employee stock purchase plan and stock purchase plan, shares   287,000    
Issuance of restricted stock and conversion of restricted stock units to common stock   $ 8,000 (8,000)  
Issuance of restricted stock and conversion of restricted stock units to common stock, shares   841,000    
Issuance of restricted stock   841,000    
Issuance of restricted stock Value   $ 8,000 (8,000)  
Stock-based compensation expense 16,977,000   16,977,000  
Forfeitures of restricted stock   $ 1,000 (1,000)  
Forfeitures of restricted stock, shares   (60,000)    
Repurchased common stock $ (88,511,000) $ 45,000 88,466,000  
Repurchased common stock, shares 0 4,544,000    
Balance at Dec. 31, 2022 $ 891,632,000 $ 829,000 $ 983,601,000 $ 92,798,000
Balance, Shares at Dec. 31, 2022   82,947,000    
[1] Presented within retained (deficit) earnings as the balance is immaterial.