Stock-Based Compensation - Restricted Stock Units (Details) - Restricted stock units shares in Thousands	6 Months Ended
	Jun. 30, 2020 $ / shares shares
Shares
Balance (in shares) | shares	2,404
Granted (in shares) | shares	2,335
Vested (in shares) | shares	(578)
Canceled/Forfeited (in shares) | shares	(105)
Balance (in shares) | shares	4,056
Weighted Average Grant Date Fair Value
Balance (in dollars per share) | $ / shares	$ 19.86
Granted (in dollars per share) | $ / shares	27.89
Vested (in dollars per share) | $ / shares	15.50
Canceled/Forfeited (in dollars per share) | $ / shares	21.58
Balance (in dollars per share) | $ / shares	$ 24.10