Annual report pursuant to Section 13 and 15(d)

Business Acquisitions and Dispositions - Revenues and Other Activities Associated with Disposed Dealerships That Remain in Continuing Operations (Details)

v3.10.0.1
Business Acquisitions and Dispositions - Revenues and Other Activities Associated with Disposed Dealerships That Remain in Continuing Operations (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Jun. 30, 2018
Mar. 31, 2018
Jun. 30, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Lease exit accrual adjustments and charges $ (2,600) $ (4,800) $ (1,000)      
Disposed dealerships that remain in continuing operations            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Income (loss) from operations       $ (8,033) $ (6,109) $ (2,244)
Gain (loss) on disposal       39,307 9,974 (47)
Lease exit accrual adjustments and charges       959 0 (1,020)
Property impairment charges       (694) (169) (119)
Pre-tax income (loss)       31,539 3,696 (3,430)
Total revenues       $ 127,213 $ 530,294 $ 579,938