Non-controlling Interests - Narrative (Details) $ in Thousands		8 Months Ended	12 Months Ended
May 03, 2017	Dec. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)
Noncontrolling Interest [Line Items]
Conversion ratio	0.8		1.25
Carvana Group
Noncontrolling Interest [Line Items]
Ownership percentage by Carvana Co.		12.90%	12.90%
Ownership percentage by existing unitholders		87.10%	87.10%
Additional Paid-in Capital
Noncontrolling Interest [Line Items]
Noncontrolling interest, adjustment related to exchanges of LLC Units		$ 3,631	$ (3,600)
Adjustments to non-controlling interests		340	300
Non-controlling Interests
Noncontrolling Interest [Line Items]
Noncontrolling interest, adjustment related to exchanges of LLC Units		(3,631)	(3,631)
Adjustments to non-controlling interests		$ (340)	$ (340)

Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4569655-111683

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 24
-URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4616395-111683

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