Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Cumulative Effect of Adjustments for Adoption of ASC 606 (Details)

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Summary of Significant Accounting Policies - Cumulative Effect of Adjustments for Adoption of ASC 606 (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Revenues:          
Revenues $ 2,111,886,000 $ 2,614,081,000 $ 4,419,942,000 $ 5,003,219,000  
Cost of Sales:          
Cost of Sales (1,804,503,000) (2,232,770,000) (3,761,981,000) (4,262,897,000)  
Operating income (loss) 53,544,000 62,973,000 (168,331,000) 150,288,000  
Assets:          
Receivables, net 322,703,000   322,703,000   $ 432,742,000
Liabilities:          
Other accrued liabilities 293,714,000   293,714,000   266,211,000
Deferred income taxes 1,912,000   1,912,000   8,927,000
Stockholders' Equity:          
Retained Earnings (Accumulated Deficit) 613,033,000   613,033,000   790,158,000
Parts, service and collision repair          
Revenues:          
Revenues 259,058,000 355,312,000 593,738,000 696,742,000  
Cost of Sales:          
Cost of Sales (134,779,000) (184,766,000) (311,560,000) (362,960,000)  
Finance, insurance and other, net          
Revenues:          
Revenues 110,773,000 $ 118,349,000 226,064,000 $ 224,587,000  
ASU 2014-09 | Finance, insurance and other, net          
Assets:          
Contract assets $ 8,500,000   $ 8,500,000   $ 12,900,000