Contractual interest rate for funds borrowed, under the debt agreement.

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Debt - Schedule of Carrying Value of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	May 19, 2020	May 15, 2020	Oct. 09, 2019
Debt Instrument [Line Items]
Total debt	$ 4,839,533	$ 2,283,732
Convertible Debt
Debt Instrument [Line Items]
Total convertible senior notes	1,319,224	1,613,523
Convertible Debt \| 1.375% convertible senior notes due 2026
Debt Instrument [Line Items]
Total convertible senior notes	$ 368,773	347,566
Debt instrument, interest rate stated percentage	1.375%
Convertible Debt \| 2.75% convertible senior notes due 2025
Debt Instrument [Line Items]
Total convertible senior notes	$ 443,505	414,888
Debt instrument, interest rate stated percentage	2.75%		2.75%	2.75%
Convertible Debt \| 0.75% convertible senior notes due 2024
Debt Instrument [Line Items]
Total convertible senior notes	$ 506,946	524,273
Debt instrument, interest rate stated percentage	0.75%				0.75%
Convertible Debt \| 1.50% convertible senior notes due 2023
Debt Instrument [Line Items]
Total convertible senior notes	$ 0	326,796
Debt instrument, interest rate stated percentage	1.50%
Homes
Debt Instrument [Line Items]
Long-term debt	$ 3,400,000	361,200
Total debt	3,408,349	361,166
Homes \| Securitization \| 2021-1 term loan
Debt Instrument [Line Items]
Long-term debt	471,975	0
Homes \| Securitization \| 2021-2 term loan
Debt Instrument [Line Items]
Long-term debt	736,778	0
Mortgages
Debt Instrument [Line Items]
Warehouse lines of credit	111,960	309,043
Goldman Sachs Bank USA \| Line of Credit \| Homes
Debt Instrument [Line Items]
Short-term debt	548,345	145,825
Citibank, N.A. \| Mortgages
Debt Instrument [Line Items]
Short-term debt	16,912	90,227
Citibank, N.A. \| Line of Credit \| Homes
Debt Instrument [Line Items]
Short-term debt	770,306	87,103
Credit Suisse AG, Cayman Islands \| Homes \| Line of Credit \| 2021-1 variable funding line
Debt Instrument [Line Items]
Long-term debt	16,846	0
Credit Suisse AG, Cayman Islands \| Homes \| Line of Credit \| 2021-2 variable funding line
Debt Instrument [Line Items]
Long-term debt	29,193	0
Credit Suisse AG, Cayman Islands \| Mortgages
Debt Instrument [Line Items]
Short-term debt	76,392	149,913
Credit Suisse AG, Cayman Islands \| Line of Credit \| Homes
Debt Instrument [Line Items]
Short-term debt	834,906	128,238
Comerica Bank \| Line of Credit \| Mortgages
Debt Instrument [Line Items]
Warehouse lines of credit	$ 18,656	$ 68,903