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 6 Months Ended
Dec. 31, 2019
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 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   $ 3,400   $ 400 $ 200 $ 400
Percentage of dealership that is accounted for under the equity method   50.00%     50.00%  
Contract work in process $ 5,100   $ 4,600      
Effective tax rate from continuing operations   17.20% 18.30% 27.40%   29.60%
Tax expense for uncertain tax positions         $ 1,400 $ 200
Discrete benefit related to vested or exercised stock compensation         200 200
Discrete charge related to non-deductible asset impairment charge   $ 300        
Income benefit   (6,437)   $ (10,071) 37,680 (29,058)
Impairment charges   833 $ (800) 0 268,833 1,952
Goodwill, Impairment Loss         268,000  
Income Tax Benefit Goodwill Impairment         55,800  
Effective Income Tax Rate Reconciliation, Tax Settlement, State and Local, Amount   $ 3,400   $ 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 $ 8,500     $ 8,500