Annual report pursuant to Section 13 and 15(d)

Description of Business and Summary of Significant Accounting Policies - Range of Estimated Useful Lives (Detail)

v2.4.1.9
Description of Business and Summary of Significant Accounting Policies - Range of Estimated Useful Lives (Detail)
12 Months Ended
Dec. 31, 2014
Leasehold and Land Improvements [Member] | Minimum [Member]  
Property Plant And Equipment [Line Items]  
Estimated useful lives 10 years
Leasehold and Land Improvements [Member] | Maximum [Member]  
Property Plant And Equipment [Line Items]  
Estimated useful lives 30 years
Buildings [Member] | Minimum [Member]  
Property Plant And Equipment [Line Items]  
Estimated useful lives 10 years
Buildings [Member] | Maximum [Member]  
Property Plant And Equipment [Line Items]  
Estimated useful lives 30 years
Parts and Service Equipment [Member] | Minimum [Member]  
Property Plant And Equipment [Line Items]  
Estimated useful lives 7 years
Parts and Service Equipment [Member] | Maximum [Member]  
Property Plant And Equipment [Line Items]  
Estimated useful lives 10 years
Office Equipment and Fixtures [Member] | Minimum [Member]  
Property Plant And Equipment [Line Items]  
Estimated useful lives 3 years
Office Equipment and Fixtures [Member] | Maximum [Member]  
Property Plant And Equipment [Line Items]  
Estimated useful lives 10 years
Company Vehicles [Member] | Minimum [Member]  
Property Plant And Equipment [Line Items]  
Estimated useful lives 3 years
Company Vehicles [Member] | Maximum [Member]  
Property Plant And Equipment [Line Items]  
Estimated useful lives 5 years