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Description of Business and Summary of Significant Accounting Policies - Range of Estimated Useful Lives (Detail)
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12 Months Ended |
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Dec. 31, 2013
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Leasehold and Land Improvements [Member] | Maximum [Member]
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| Property, Plant and Equipment [Line Items] | |
| Estimated useful lives | 30 years |
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Leasehold and Land Improvements [Member] | Minimum [Member]
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| Property, Plant and Equipment [Line Items] | |
| Estimated useful lives | 10 years |
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Buildings [Member] | Maximum [Member]
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| Property, Plant and Equipment [Line Items] | |
| Estimated useful lives | 30 years |
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Buildings [Member] | Minimum [Member]
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| Property, Plant and Equipment [Line Items] | |
| Estimated useful lives | 10 years |
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Parts and Service Equipment [Member] | Maximum [Member]
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| Property, Plant and Equipment [Line Items] | |
| Estimated useful lives | 10 years |
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Parts and Service Equipment [Member] | Minimum [Member]
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| Property, Plant and Equipment [Line Items] | |
| Estimated useful lives | 7 years |
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Office Equipment and Fixtures [Member] | Maximum [Member]
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| Property, Plant and Equipment [Line Items] | |
| Estimated useful lives | 10 years |
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Office Equipment and Fixtures [Member] | Minimum [Member]
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| Property, Plant and Equipment [Line Items] | |
| Estimated useful lives | 3 years |
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Company Vehicles [Member] | Maximum [Member]
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| Property, Plant and Equipment [Line Items] | |
| Estimated useful lives | 5 years |
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Company Vehicles [Member] | Minimum [Member]
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| Property, Plant and Equipment [Line Items] | |
| Estimated useful lives | 3 years |