Stockholders' Equity and Stock-Based Compensation - Options Activity (Details) shares in Thousands	9 Months Ended
	Sep. 30, 2020 $ / shares shares
Shares (in thousands)
Options outstanding, beginning of period (in shares) | shares	4,253
Granted (in shares) | shares	1,396
Exercised (in shares) | shares	(239)
Canceled (in shares) | shares	(230)
Options outstanding, end of period (in shares) | shares	5,180
Weighted- Average Exercise Price per Share
Outstanding weighted average exercise price, beginning balance (in usd per share) | $ / shares	$ 29.59
Granted weighted average exercise price (in usd per share) | $ / shares	28.83
Exercised weighted average exercise price (in usd per share) | $ / shares	16.64
Canceled weighted average exercise price (in usd per share) | $ / shares	39.02
Outstanding weighted average exercise price, ending balance (in usd per share) | $ / shares	$ 29.57