Inventory - Narrative (Details) $ in Thousands	12 Months Ended
Dec. 31, 2021 USD ($) home	Dec. 31, 2020 USD ($) home
Inventory Disclosure [Abstract]
Lower of cost or net realizable value write-downs	$ 2,364	$ 29
Number of homes purchased \| home	2,021	394
Inventory additions	$ 1,034,916	$ 158,269
Number of homes sold \| home	1,450	453
Inventory sales	$ 738,809	$ 182,906

Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=116847112&loc=d3e4542-108314

Name:	us-gaap_InventoryWriteDown
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration