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Stock-based Compensation - Schedule of Restricted Stock Units Activity (Details)
shares in Thousands
6 Months Ended
Jun. 30, 2020
$ / shares
shares
Restricted Stock and Restricted Stock Units  
Restricted Stock and RSUs  
Unvested and outstanding, beginning balance (in shares) | shares 6,508
Forfeited (in shares) | shares (278)
Unvested, ending balance (in shares) | shares 7,990
Vested and not yet released (in shares) | shares 9
Outstanding at end of period (in shares) | shares 7,999
Weighted-Average Grant Date Fair Value  
Unvested, weighted average grant date fair value, beginning balance (in dollars per share) | $ / shares $ 11.08
Forfeited (in dollars per share) | $ / shares 11.35
Unvested, weighted average grant date fair value, ending balance (in dollars per share) | $ / shares 13.04
Vested and not yet released, weighted-average grant date fair value (in dollars per share) | $ / shares 9.07
Outstanding at end of period, weighted-average grant date fair value (in dollars per share) | $ / shares $ 13.04
Restricted Stock Units (RSUs)  
Restricted Stock and RSUs  
Granted (in shares) | shares 1,987
Vested (in shares) | shares (1,068)
Weighted-Average Grant Date Fair Value  
Granted (in dollars per share) | $ / shares $ 20.61
Vested (in dollars per share) | $ / shares $ 10.17
Restricted Stock  
Restricted Stock and RSUs  
Granted (in shares) | shares 841
Weighted-Average Grant Date Fair Value  
Granted (in dollars per share) | $ / shares $ 17.06