Stockholders' Equity - Initial Public Offering (Details) $ / shares in Units, $ in Thousands		5 Months Ended
	May 03, 2017 USD ($) $ / shares shares	Sep. 30, 2017 USD ($)	Apr. 30, 2018 shares
Limited Partners' Capital Account [Line Items]
Stock sold during period, net proceeds | $		$ 205,925
Class A Common Units | Ernest Garcia, II
Limited Partners' Capital Account [Line Items]
Investment owned, balance (in shares)	200,000
Interest acquired	0.10%
Carvana Group | Class A Common Units
Limited Partners' Capital Account [Line Items]
Investment owned, balance (in shares)	18,800,000		8,300,000
LLC price per unit, multiple on initial public offering price less underwriting discounts and commissions	0.8
Class A | IPO
Limited Partners' Capital Account [Line Items]
Sale of stock, number of shares issued in transaction (in shares)	15,000,000.0
Sale of stock, price per share (in dollars per share) | $ / shares	$ 15.00
Stock sold during period, net proceeds | $	$ 205,800