Stockholders' Equity - CEO Performance Award (Details) $ in Thousands		12 Months Ended
	May 24, 2018 USD ($) tranche shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 shares	Dec. 31, 2017 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
New option granted (in shares) | shares		0	0	0
First tranche	$ 2,500,000
Incremental increase	$ 1,000,000
Incremental stock option expense		$ 37,400
Number of Options expected to vest, end of year (in shares) | shares		4,800,000
Weighted average period		6 years
Revenue Goal 1		$ 710,058
Adjusted EBITDA Goal 9		125,000
Revenue Goal 2		860,058
Adjusted EBITDA Goal 10		155,000
Revenue Goal 3		1,010,058
Adjusted EBITDA Goal 11		175,000
Revenue Goal 4		1,210,058
Adjusted EBITDA Goal 12		190,000
Revenue Goal 5		1,410,058
Adjusted EBITDA Goal 13		200,000
Revenue Goal 6		1,610,058
Adjusted EBITDA Goal 14		210,000
Revenue Goal 7		1,810,058
Adjusted EBITDA Goal 15		220,000
Revenue Goal 8		2,010,058
Adjusted EBITDA Goal 16		$ 230,000
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
New option granted (in shares) | shares	6,365,856
Weighted average period		5 years 10 months 24 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
Chief Executive Officer | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized stock-based compensation expense for operational goals		$ 154,200
Unrecognized expense for the operational goals that were not probable of achievement		$ 54,400