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Restructuring Costs (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]            
Restructuring Costs $ 20,600          
Operations restructuring costs   $ 4,700   $ 20,579 $ 4,655 $ 0
Restructuring Reserve [Roll Forward]            
Corporate restructuring and restatement costs       13,700 22,200 $ 32,300
Restructuring Reserves            
Restructuring Cost and Reserve [Line Items]            
Restructuring charges       9,948    
Restructuring Reserve [Roll Forward]            
Beginning balance at June 30, 2018     $ 3,375 544    
Charges/Adjustments     597 (79)    
Payments     (2,234) (9,070)    
Ending balance at December 31, 2018   3,375 $ 544 $ 1,343 $ 544  
Property, Plant and Equipment            
Restructuring Cost and Reserve [Line Items]            
Initial write-down of assets to fair value   1,300        
Accrued Expenses and Other Liabilities            
Restructuring Cost and Reserve [Line Items]            
Initial write-down of assets to fair value   $ 3,400        
TL            
Restructuring Cost and Reserve [Line Items]            
Restructuring Costs 10,600          
Assets Leased to Others [Member] | TL            
Restructuring Cost and Reserve [Line Items]            
Restructuring Costs 8,100          
Vehicles [Member] | TL            
Restructuring Cost and Reserve [Line Items]            
Restructuring Costs $ 2,500