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Consolidated Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Additional Paid-in Capital
Accumulated Deficit
Accumulated Other Comprehensive Income (Loss)
Class A Non-voting Common Stock
Common Stock
Class B Voting Common Stock
Common Stock
Class C Voting Common Stock
Common Stock
Balance, beginning of period, shares at Dec. 31, 2017         883,022 122,564 216,616
Balance, beginning of period at Dec. 31, 2017   $ 7,634,825 $ (4,656,667) $ 14,157 $ 9 $ 1 $ 2
Shares issued in connection with exercise of stock options under stock-based compensation plans, shares         14,447 2,882  
Shares issued in connection with exercise of stock options under stock-based compensation plans   45,793          
Issuance of voting/non-voting common stock for vesting of restricted stock units and restricted stock awards, shares         12,109 1,180  
Conversion of stock to voting/non-voting common stock, shares         29,669 (29,669)  
Issuance of Class C voting common stock for settlement of restricted stock awards net, Shares             1,619
Stock-based compensation expense   133,258          
Stock repurchases from employees for tax withholdings   (551)          
Net loss $ (385,785)   (385,785)        
Other comprehensive income (loss) $ 6,806     6,806      
Balance, end of period, shares at Mar. 31, 2018 1,254,439       939,247 96,957 218,235
Balance, end of period at Mar. 31, 2018 $ 2,791,848 7,813,325 (5,042,452) 20,963 $ 9 $ 1 $ 2
Balance, beginning of period, shares at Dec. 31, 2018         999,304 93,846 224,611
Balance, beginning of period at Dec. 31, 2018 2,310,999 8,220,417 (5,912,578) 3,147 $ 10 $ 1 $ 2
Shares issued in connection with exercise of stock options under stock-based compensation plans, shares         1,260 650  
Shares issued in connection with exercise of stock options under stock-based compensation plans   5,635          
Issuance of voting/non-voting common stock for vesting of restricted stock units and restricted stock awards, shares         13,382 203  
Conversion of stock to voting/non-voting common stock, shares         43,189 (43,189)  
Conversion of stock to voting/non-voting common stock         $ 1 $ 0  
Issuance of Class C voting common stock for settlement of restricted stock awards net, Shares             1,676
Stock-based compensation expense   162,556          
Net loss (310,407)   (310,407)        
Other comprehensive income (loss) $ (3,215)     (3,215)      
Balance, end of period, shares at Mar. 31, 2019 1,334,932       1,057,135 51,510 226,287
Balance, end of period at Mar. 31, 2019 $ 2,165,877 $ 8,388,608 (6,222,677) $ (68) $ 11 $ 1 $ 2
Cumulative-effect adjustment from accounting changes     $ 308