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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Loss
Accumulated Deficit
Adoption of ASU
Accumulated Deficit
Adoption of ASU
Total
Balances at Dec. 31, 2018 $ 213 $ 3,813,678 $ (10,165)   $ (1,877,759)   $ 1,925,967
Increase (Decrease) in Stockholders' Equity              
Issuance of shares of Common Stock upon exercise of stock options and settlement of employee restricted stock units and performance shares 1 15,480         15,481
Issuance of shares of Common Stock for services rendered   104         104
Stock compensation   40,690         40,690
Other comprehensive income     918       918
Net income (loss)         102,312   102,312
Balances at Mar. 31, 2019 214 3,869,952 (9,247)   (1,775,352)   2,085,567
Balances at Dec. 31, 2018 213 3,813,678 (10,165)   (1,877,759)   1,925,967
Increase (Decrease) in Stockholders' Equity              
Other comprehensive income             1,551
Net income (loss)             335,901
Balances at Sep. 30, 2019 215 3,972,689 (8,614)   (1,541,763)   2,422,527
Balances at Mar. 31, 2019 214 3,869,952 (9,247)   (1,775,352)   2,085,567
Increase (Decrease) in Stockholders' Equity              
Issuance of shares of Common Stock upon exercise of stock options and settlement of employee restricted stock units and shares of Common Stock under the ESPP 1 15,190         15,191
Issuance of shares of Common Stock for services rendered   123         123
Stock compensation   40,710         40,710
Other comprehensive income     282       282
Net income (loss)         105,318   105,318
Balances at Jun. 30, 2019 215 3,925,975 (8,965)   (1,670,034)   2,247,191
Increase (Decrease) in Stockholders' Equity              
Issuance of shares of Common Stock upon exercise of stock options and settlement of employee restricted stock units and performance shares   3,111         3,111
Issuance of shares of Common Stock for services rendered   129         129
Stock compensation   43,474         43,474
Other comprehensive income     351       351
Net income (loss)         128,271   128,271
Balances at Sep. 30, 2019 215 3,972,689 (8,614)   (1,541,763)   2,422,527
Balances at Dec. 31, 2019 216 4,044,490 (15,542) $ 95 (1,430,758) $ 95 2,598,406
Increase (Decrease) in Stockholders' Equity              
Issuance of shares of Common Stock upon exercise of stock options and settlement of employee restricted stock units and performance shares 1 14,618         14,619
Issuance of shares of Common Stock for services rendered   145         145
Stock compensation   42,758         42,758
Other comprehensive income     2,435       2,435
Net income (loss)         (720,642)   (720,642)
Balances at Mar. 31, 2020 217 4,102,011 (13,107)   (2,151,400)   1,937,721
Balances at Dec. 31, 2019 216 4,044,490 (15,542) $ 95 (1,430,758) $ 95 2,598,406
Increase (Decrease) in Stockholders' Equity              
Other comprehensive income             5,794
Net income (loss)             (445,547)
Balances at Sep. 30, 2020 219 4,276,667 (9,748)   (1,876,305)   2,390,833
Balances at Mar. 31, 2020 217 4,102,011 (13,107)   (2,151,400)   1,937,721
Increase (Decrease) in Stockholders' Equity              
Issuance of shares of Common Stock upon exercise of stock options and settlement of employee restricted stock units and shares of Common Stock under the ESPP 1 69,193         69,194
Issuance of shares of Common Stock upon conversion of Convertible Senior Notes   162         162
Issuance of shares of Common Stock for services rendered   139         139
Stock compensation   46,406         46,406
Other comprehensive income     684       684
Net income (loss)         290,298   290,298
Balances at Jun. 30, 2020 218 4,217,911 (12,423)   (1,861,102)   2,344,604
Increase (Decrease) in Stockholders' Equity              
Issuance of shares of Common Stock upon exercise of stock options and settlement of employee restricted stock units and performance shares 1 7,782         7,783
Issuance of shares of Common Stock upon conversion of Convertible Senior Notes   6,873         6,873
Issuance of shares of Common Stock for services rendered   131         131
Stock compensation   43,970         43,970
Other comprehensive income     2,675       2,675
Net income (loss)         (15,203)   (15,203)
Balances at Sep. 30, 2020 $ 219 $ 4,276,667 $ (9,748)   $ (1,876,305)   $ 2,390,833