Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Details)

v3.20.2
Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2019
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Schedule of Equity Method Investments [Line Items]          
Discrete charge for non-deductible executive compensation, transition costs         $ 1,500
Effective Income Tax Rate Reconciliation, Tax Settlement, State and Local, Amount     $ 400 $ 200 $ 400
Discrete charge for non-deductible disposition   $ 100   $ 100  
Percentage of dealership that is accounted for under the equity method   50.00%   50.00%  
Contract work in process $ 5,100     $ 4,300  
Effective tax rate from continuing operations   25.60% 28.00% 13.60% 29.20%
Tax expense for uncertain tax positions       $ 1,400 $ 200
Discrete benefit related to vested or exercised stock compensation       200 200
Income benefit   $ (20,685) $ (11,372) 16,995 (40,430)
Impairment charges   $ 26 1,124 268,859 3,076
Goodwill, Impairment Loss       268,000  
Income Tax Benefit Goodwill Impairment       55,800  
Effective Income Tax Rate Reconciliation, Tax Settlement, State and Local, Amount     $ 400 $ 200 $ 400
Dealership          
Schedule of Equity Method Investments [Line Items]          
Percentage of dealership that is accounted for under the equity method   50.00%   50.00%  
ASU 2014-09 | Finance, insurance and other, net          
Schedule of Equity Method Investments [Line Items]          
Contract assets $ 12,900 $ 11,100   $ 11,100