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Credit Facilities - Revolving Credit Facility (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) tranche financial_institution | Dec. 31, 2017 USD ($)
Line of Credit Facility [Line Items] |  |
Offset account related to floorplan notes payable | $ 33,637,000 | $ 86,547,000
Revolving Credit Facility |  |
Line of Credit Facility [Line Items] |  |
Maximum borrowing capacity under line of credit facility | $ 1,800,000,000 |
Number of financial institutions | financial_institution | 24 |
Number of manufacturer-affiliated finance companies | financial_institution | 6 |
Number of tranches | tranche | 2 |
Maximum potential commitment | $ 2,100,000,000 |
Unamortized costs | 3,000,000 |
Maximum restricted payments | 208,500,000 |
Restricted payment basket amount | 72,400,000 |
Floorplan Line |  |
Line of Credit Facility [Line Items] |  |
Maximum borrowing capacity under line of credit facility | $ 1,750,000,000 |
Commitment fee rate | 0.15% |
Maximum period for outstanding borrowing | 1 year |
Outstanding borrowing balance | $ 1,200,000,000 |
Available borrowing capacity | 247,600,000 |
Offset account related to floorplan notes payable | $ 33,637,000 |
Weighted average interest rate | 3.70% | 2.70%
Acquisition Line |  |
Line of Credit Facility [Line Items] |  |
Maximum borrowing capacity under line of credit facility | $ 360,000,000 |
Line of credit facility minimum borrowing capacity | $ 50,000,000 |
Basis spread on interest rate | 1.50% |
Restricted payment maximum | $ 50,000,000 |
Outstanding borrowing balance | 31,800,000 | $ 27,000,000
Available borrowing capacity | $ 277,600,000 |
Debt interest rate | 2.47% | 2.25%
Letters of credit outstanding | $ 25,300,000 |
Acquisition Line | Minimum |  |
Line of Credit Facility [Line Items] |  |
Commitment fee rate | 0.20% |
Acquisition Line | Maximum |  |
Line of Credit Facility [Line Items] |  |
Commitment fee rate | 0.45% |
Acquisition Line | U.S. Dollars | Minimum |  |
Line of Credit Facility [Line Items] |  |
Basis spread on interest rate | 0.00% |
Acquisition Line | U.S. Dollars | Maximum |  |
Line of Credit Facility [Line Items] |  |
Basis spread on interest rate | 1.00% |
Acquisition Line | Euros or Pound Sterling |  |
Line of Credit Facility [Line Items] |  |
Maximum borrowing capacity under line of credit facility | $ 125,000,000 |
Acquisition Line | Euros or Pound Sterling | Minimum |  |
Line of Credit Facility [Line Items] |  |
Basis spread on interest rate | 1.25% |
Acquisition Line | Euros or Pound Sterling | Maximum |  |
Line of Credit Facility [Line Items] |  |
Basis spread on interest rate | 2.50% |
New Vehicles |  |
Line of Credit Facility [Line Items] |  |
Basis spread on interest rate | 1.25% |
Used Vehicles |  |
Line of Credit Facility [Line Items] |  |
Basis spread on interest rate | 1.50% |

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- Definition Floorplan offset. + References No definition available. + Details
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- Definition Line of credit facility, maximum borrowing capacity can be extended, amount. + References No definition available. + Details
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- Definition Line Of Credit Facility, Maximum Restricted Payments + References No definition available. + Details
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- Definition Line of credit facility minimum borrowing capacity for working capital and general corporate purposes, including acquisitions. + References No definition available. + Details
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- Definition Line of credit facility, unamortized cost. + References No definition available. + Details
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- Definition Restricted payment maximum. + References No definition available. + Details
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 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=6876686&loc=d3e534808-122878 Reference 3: 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)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition The effective interest rate at the end of the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
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