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Basis of Presentation (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Equipment rentals and services $ 60,981 $ 57,307 $ 178,865 $ 189,965
Products 10,750 16,029 45,162 51,446
General and administrative expenses $ 39,963 39,677 $ 125,107 138,586
As previously reported        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Equipment rentals and services   47,002   155,367
Products   13,237   42,594
General and administrative expenses   52,774   182,036
Reclassifications        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Equipment rentals and services   10,305   34,598
Products   2,792   8,852
General and administrative expenses   $ (13,097)   $ (43,450)