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Debt - Schedule of Carrying Value of Debt (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Debt Instrument [Line Items] |  |
Total debt | $ 2,594,414 | $ 2,283,732
Convertible senior notes |  |
Debt Instrument [Line Items] |  |
Total convertible senior notes | 1,606,582 | 1,613,523
Convertible senior notes | 2026 Notes |  |
Debt Instrument [Line Items] |  |
Total convertible senior notes | $ 357,531 | 347,566
Stated Interest Rate | 1.375% |
Convertible senior notes | 2025 Notes |  |
Debt Instrument [Line Items] |  |
Total convertible senior notes | $ 428,830 | 414,888
Stated Interest Rate | 2.75% |
Convertible senior notes | 2024 Notes |  |
Debt Instrument [Line Items] |  |
Total convertible senior notes | $ 490,126 | 524,273
Stated Interest Rate | 0.75% |
Convertible senior notes | 2023 Notes |  |
Debt Instrument [Line Items] |  |
Total convertible senior notes | $ 330,095 | 326,796
Stated Interest Rate | 1.50% |
Mortgages segment |  |
Debt Instrument [Line Items] |  |
Warehouse line of credit | $ 163,387 | 309,043
Line of Credit | Homes segment |  |
Debt Instrument [Line Items] |  |
Short-term debt | 824,445 | 361,166
Goldman Sachs Bank USA | Line of Credit | Homes segment |  |
Debt Instrument [Line Items] |  |
Short-term debt | 183,373 | 145,825
Citibank, N.A. | Mortgages segment |  |
Debt Instrument [Line Items] |  |
Short-term debt | 21,332 | 90,227
Citibank, N.A. | Line of Credit | Homes segment |  |
Debt Instrument [Line Items] |  |
Short-term debt | 219,989 | 87,103
Credit Suisse AG, Cayman Islands | Mortgages segment |  |
Debt Instrument [Line Items] |  |
Short-term debt | 99,706 | 149,913
Credit Suisse AG, Cayman Islands | Line of Credit | Homes segment |  |
Debt Instrument [Line Items] |  |
Short-term debt | 421,083 | 128,238
Comerica Bank | Line of Credit | Mortgages segment |  |
Debt Instrument [Line Items] |  |
Warehouse line of credit | $ 42,349 | $ 68,903

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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16(a)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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