Inventories and Related Notes Payable - Floor Plan - Additional Information (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Inventory Disclosure [Abstract] | |||
| Average interest rate for new vehicle floor plan facilities | 3.10% | 2.37% | 1.85% |
| Amount recognized for floor plan assistance | $ 42.2 | $ 45.3 | $ 45.0 |
| Average interest rate for used vehicle floor plan facilities | 2.98% | 2.61% | 1.78% |
| X | ||||||||||
- Definition Floor plan assistance recognized. No definition available.
|
| X | ||||||||||
- Definition Weighted average interest rate new vehicle floor plan. No definition available.
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| X | ||||||||||
- Definition Weighted average interest rate used vehicle floor plan. No definition available.
|
| X | ||||||||||
- References No definition available.
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