Stockholders' Equity - CEO Performance Award - Additional Information (Details) $ in Thousands		12 Months Ended			31 Months Ended
	May 24, 2018 USD ($) item tranche shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 shares	Dec. 31, 2018 shares	Dec. 31, 2020 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance shares authorized (in shares) | shares		0	0	0
First tranche	$ 2,500,000
Market capitalization goal increment	$ 1,000,000
Recorded share-based compensation expense					$ 93,800
Number of options expected to vest | shares		5,300,000			5,300,000
Revenue goal number 1		$ 710,058			$ 710,058
Adjusted EBITDA goal number 9		125,000			125,000
Revenue goal number 2		860,058			860,058
Adjusted EBITDA goal number 10		155,000			155,000
Revenue goal number 3		1,010,058			1,010,058
Adjusted EBITDA goal number 11		175,000			175,000
Revenue goal number 4		1,210,058			1,210,058
Adjusted EBITDA goal number 12		190,000			190,000
Revenue goal number 5		1,410,058			1,410,058
Adjusted EBITDA goal number 13		200,000			200,000
Revenue goal number 6		1,610,058			1,610,058
Adjusted EBITDA goal number 14		210,000			210,000
Revenue goal number 7		1,810,058			1,810,058
Adjusted EBITDA goal number 15		220,000			220,000
Revenue goal number 8		2,010,058			2,010,058
Adjusted EBITDA goal number 16		$ 230,000			$ 230,000
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance shares authorized (in shares) | shares	6,365,856
Number of options expected to vest | shares		500,000			500,000
Weighted average period over which costs are recognized		5 years 1 month 6 days
Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of vesting tranches of share-based awards | tranche	12
Expiration period	10 years
Number of performance goals, revenue | item	8
Number of performance goals, adjusted EBITDA | item	8
Chief Executive Officer | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share-based compensation cost related to unvested stock option awards, probable of achievement		$ 134,500			$ 134,500
Unrecognized share-based compensation cost related to unvested stock option awards, not probable of achievement		$ 17,600			$ 17,600