Summary of Quarterly Financial Data (Unaudited) - Additional Information (Detail) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 |
Sep. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
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| Condensed Unaudited Quarterly Financial Data [Line Items] | |||||||||
| Pre-tax benefit related to an original equipment manufacturer emissions-related settlement | $ 14,800 | ||||||||
| Asset impairment charges | 1,800 | $ 6,100 | $ 1,300 | $ 10,500 | $ 6,200 | $ 8,063 | $ 17,955 | $ 6,594 | |
| Pre-tax benefit related to lease exit and storm damage accrual adjustments | 400 | ||||||||
| Pre-tax benefit (charges) related to lease exit accrual adjustments | $ (500) | (1,000) | $ 500 | ||||||
| Pre-tax charges against to natural damages | $ 2,300 | $ 6,000 | 4,200 | ||||||
| Pre-tax gain (loss) on disposal | $ (47) | $ 2,748 | $ 11,079 | ||||||
| Pre-tax severance expenses | $ 900 | ||||||||
| Franchised Dealerships [Member] | |||||||||
| Condensed Unaudited Quarterly Financial Data [Line Items] | |||||||||
| Pre-tax gain (loss) on disposal | $ 2,300 | $ 1,100 | |||||||
| X | ||||||||||
- Definition Benefit (expenses) related to lease exit accrual adjustments. No definition available.
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| X | ||||||||||
- Definition Benefit from emissions related settlement. No definition available.
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| X | ||||||||||
- Definition Benefit related to lease exit accrual adjustments and catastrophes. No definition available.
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| X | ||||||||||
- Definition Line items constituting unaudited summary of quarterly financial data. No definition available.
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| X | ||||||||||
- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The charge against earnings in the period for the uninsured portion of a loss from a fire, explosion, or natural disaster (hurricane, earthquake). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Details
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