Rental Fleet (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2017
Dec. 31, 2016
Property Subject to or Available for Operating Lease [Line Items]    
Total fleet, net $ 964,141 $ 950,065
Storage Solutions    
Property Subject to or Available for Operating Lease [Line Items]    
Rental fleet, gross 1,002,739 977,098
Accumulated depreciation (159,708) (151,238)
Total fleet, net $ 843,031 825,860
Storage Solutions | Steel storage containers    
Property Subject to or Available for Operating Lease [Line Items]    
Residual Value as Percentage of Original Cost [1] 55.00%  
Estimated Useful Life in Years 30 years  
Rental fleet, gross $ 636,092 625,094
Storage Solutions | Steel ground level offices    
Property Subject to or Available for Operating Lease [Line Items]    
Residual Value as Percentage of Original Cost [1] 55.00%  
Estimated Useful Life in Years 30 years  
Rental fleet, gross $ 358,806 347,574
Storage Solutions | Other    
Property Subject to or Available for Operating Lease [Line Items]    
Rental fleet, gross 7,841 4,430
Tank & Pump Solutions    
Property Subject to or Available for Operating Lease [Line Items]    
Rental fleet, gross 159,212 156,629
Accumulated depreciation (38,102) (32,424)
Total fleet, net $ 121,110 124,205
Tank & Pump Solutions | Steel tanks    
Property Subject to or Available for Operating Lease [Line Items]    
Estimated Useful Life in Years 25 years  
Rental fleet, gross $ 62,991 61,955
Tank & Pump Solutions | Roll-off boxes    
Property Subject to or Available for Operating Lease [Line Items]    
Rental fleet, gross $ 28,817 28,743
Tank & Pump Solutions | Roll-off boxes | Minimum    
Property Subject to or Available for Operating Lease [Line Items]    
Estimated Useful Life in Years 15 years  
Tank & Pump Solutions | Roll-off boxes | Maximum    
Property Subject to or Available for Operating Lease [Line Items]    
Estimated Useful Life in Years 20 years  
Tank & Pump Solutions | Stainless steel tank trailers    
Property Subject to or Available for Operating Lease [Line Items]    
Estimated Useful Life in Years 25 years  
Rental fleet, gross $ 29,093 29,150
Tank & Pump Solutions | Vacuum Boxes    
Property Subject to or Available for Operating Lease [Line Items]    
Estimated Useful Life in Years 20 years  
Rental fleet, gross $ 12,142 11,512
Tank & Pump Solutions | De-watering boxes    
Property Subject to or Available for Operating Lease [Line Items]    
Estimated Useful Life in Years 20 years  
Rental fleet, gross $ 5,981 5,429
Tank & Pump Solutions | Pumps and filtration equipment    
Property Subject to or Available for Operating Lease [Line Items]    
Estimated Useful Life in Years 7 years  
Rental fleet, gross $ 13,242 13,690
Tank & Pump Solutions | Other    
Property Subject to or Available for Operating Lease [Line Items]    
Rental fleet, gross $ 6,946 $ 6,150
[1] Tank & Pump Solutions fleet has been assigned zero residual value.