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Property, Plant and Equipment (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Property Plant And Equipment [Line Items]    
Land $ 1,626 $ 1,653
Vehicles and machinery 176,148 174,191
Buildings and improvements [1] 32,721 33,137
Computer equipment and software 78,675 76,587
Furniture and office equipment 4,975 5,354
Property, plant and equipment 294,145 290,922
Accumulated depreciation (140,321) (133,739)
Property, plant and equipment, net $ 153,824 $ 157,183
Vehicles and machinery | Minimum    
Property Plant And Equipment [Line Items]    
Residual Value as Percentage of Original Cost 0.00%  
Estimated Useful Life in Years 5 years  
Vehicles and machinery | Maximum    
Property Plant And Equipment [Line Items]    
Residual Value as Percentage of Original Cost 55.00%  
Estimated Useful Life in Years 30 years  
Buildings and improvements | Minimum    
Property Plant And Equipment [Line Items]    
Residual Value as Percentage of Original Cost [1] 0.00%  
Estimated Useful Life in Years [1] 3 years  
Buildings and improvements | Maximum    
Property Plant And Equipment [Line Items]    
Residual Value as Percentage of Original Cost [1] 25.00%  
Estimated Useful Life in Years [1] 30 years  
Computer equipment and software    
Property Plant And Equipment [Line Items]    
Residual Value as Percentage of Original Cost 0.00%  
Computer equipment and software | Minimum    
Property Plant And Equipment [Line Items]    
Estimated Useful Life in Years 3 years  
Computer equipment and software | Maximum    
Property Plant And Equipment [Line Items]    
Estimated Useful Life in Years 10 years  
Furniture and office equipment    
Property Plant And Equipment [Line Items]    
Residual Value as Percentage of Original Cost 0.00%  
Furniture and office equipment | Minimum    
Property Plant And Equipment [Line Items]    
Estimated Useful Life in Years 3 years  
Furniture and office equipment | Maximum    
Property Plant And Equipment [Line Items]    
Estimated Useful Life in Years 10 years  
[1] Improvements made to leased properties are depreciated over the lesser of the estimated remaining life or the remaining term of the respective lease.