Debt Instruments	9 Months Ended
Sep. 30, 2017
Debt Disclosure [Abstract]
Debt Instruments	NOTE 7 — DEBT INSTRUMENTS Floor Plan Facility The Company has a floor plan facility with a third party to finance its used vehicle inventory, which is secured by substantially all of its assets, other than the Company's interests in real property (the "Floor Plan Facility"). The Company most recently amended the Floor Plan Facility in August 2017 to, among other things, extend the maturity date to December 31, 2018, and increase the available credit to $275.0 million through December 31, 2017 and to $350.0 million from January 1, 2018 through December 31, 2018. The Company is required to make monthly interest payments at a rate per annum equal to one-month LIBOR plus 3.65%, effective August 1, 2017. The Floor Plan Facility requires that at least 5% of the total principal amount owed to the lender is held as restricted cash. Repayment in an amount equal to the amount of the advance or loan must be made within five business days of selling or otherwise disposing of the underlying vehicle inventory. For sales involving financing originated by the Company and sold under either the Purchase and Sale Agreement or the Master Transfer Agreement as mentioned in Note 6 — Finance Receivable Sale Agreements, the lender has extended repayment to the earlier of fifteen business days after the sale of the used vehicle or one day following the sale of the related finance receivable. Outstanding balances related to vehicles held in inventory for more than 180 days require monthly principal payments equal to 10% of the original principal amount of that vehicle until the remaining outstanding balance is the lesser of i) 50% of the original principal amount or ii) 50% of the wholesale value. Prepayments may be made without incurring a premium or penalty. Additionally, the Company is permitted to make prepayments to the lender to be held as principal payments under the Floor Plan Facility and subsequently re-borrow such amounts. As of September 30, 2017, the interest rate on the Floor Plan Facility was approximately 4.88%, the Company had an outstanding balance under this facility of approximately $195.1 million, borrowing capacity available of approximately $79.9 million and held approximately $9.8 million in restricted cash related to this facility. As of December 31, 2016, the Company held approximately $8.4 million in restricted cash related to this facility. Notes Payable From time to time, the Company enters into promissory note agreements to finance equipment for its transportation fleet. The assets financed with the proceeds from these notes serve as the collateral for each note and certain security agreements related to these assets have cross collateralization and cross default provisions with respect to one another. Each note has a fixed annual interest rate, five-year term and requires monthly payments. As of September 30, 2017, the outstanding principal of these notes had a weighted-average interest rate of 5.8% and totaled approximately $16.7 million, of which approximately $3.4 million is due within the next twelve months and is included as current portion of long-term debt in the accompanying unaudited condensed consolidated balance sheets. Other Long-Term Debt The Company has financed certain purchases of its property and equipment through a sale and leaseback transaction which is treated as a financing transaction in accordance with applicable accounting guidance. As of September 30, 2017, the liability associated with this arrangement is approximately $3.0 million and is included in long-term debt in the accompanying unaudited condensed consolidated balance sheet.

NOTE 7 — DEBT INSTRUMENTS

Floor Plan Facility

The Company has a floor plan facility with a third party to finance its used vehicle inventory, which is secured by substantially all of its assets, other than the Company's interests in real property (the "Floor Plan Facility"). The Company most recently amended the Floor Plan Facility in August 2017 to, among other things, extend the maturity date to December 31, 2018, and increase the available credit to $275.0 million through December 31, 2017 and to $350.0 million from January 1, 2018 through December 31, 2018. The Company is required to make monthly interest payments at a rate per annum equal to one-month LIBOR plus 3.65%, effective August 1, 2017. The Floor Plan Facility requires that at least 5% of the total principal amount owed to the lender is held as restricted cash.

Repayment in an amount equal to the amount of the advance or loan must be made within five business days of selling or otherwise disposing of the underlying vehicle inventory. For sales involving financing originated by the Company and sold under either the Purchase and Sale Agreement or the Master Transfer Agreement as mentioned in Note 6 — Finance Receivable Sale Agreements, the lender has extended repayment to the earlier of fifteen business days after the sale of the used vehicle or one day following the sale of the related finance receivable. Outstanding balances related to vehicles held in inventory for more than 180 days require monthly principal payments equal to 10% of the original principal amount of that vehicle until the remaining outstanding balance is the lesser of i) 50% of the original principal amount or ii) 50% of the wholesale value. Prepayments may be made without incurring a premium or penalty. Additionally, the Company is permitted to make prepayments to the lender to be held as principal payments under the Floor Plan Facility and subsequently re-borrow such amounts.

As of September 30, 2017, the interest rate on the Floor Plan Facility was approximately 4.88%, the Company had an outstanding balance under this facility of approximately $195.1 million, borrowing capacity available of approximately $79.9 million and held approximately $9.8 million in restricted cash related to this facility. As of December 31, 2016, the Company held approximately $8.4 million in restricted cash related to this facility.

Notes Payable

From time to time, the Company enters into promissory note agreements to finance equipment for its transportation fleet. The assets financed with the proceeds from these notes serve as the collateral for each note and certain security agreements related to these assets have cross collateralization and cross default provisions with respect to one another. Each note has a fixed annual interest rate, five-year term and requires monthly payments. As of September 30, 2017, the outstanding principal of these notes had a weighted-average interest rate of 5.8% and totaled approximately $16.7 million, of which approximately $3.4 million is due within the next twelve months and is included as current portion of long-term debt in the accompanying unaudited condensed consolidated balance sheets.

Other Long-Term Debt

The Company has financed certain purchases of its property and equipment through a sale and leaseback transaction which is treated as a financing transaction in accordance with applicable accounting guidance. As of September 30, 2017, the liability associated with this arrangement is approximately $3.0 million and is included in long-term debt in the accompanying unaudited condensed consolidated balance sheet.