Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Summary of Lease Exit Accruals (Parenthetical) (Detail)

v3.7.0.1
Summary of Significant Accounting Policies - Summary of Lease Exit Accruals (Parenthetical) (Detail)
$ in Millions
3 Months Ended
Mar. 31, 2017
USD ($)
Accounting Policies [Abstract]  
Component of lease exit expense in income (loss) from operations and the sale of dealerships before tax $ 0.6
Component of lease exit payments in selling, general and administrative expenses 0.2
Component of lease exit payments in income (loss) from operations and the sale of dealerships before tax $ 1.0