Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Summary of Property Plant and Equipment and Rental Equipment with Related Accumulated Depreciation (Details)

v2.4.0.8
Summary of Significant Accounting Policies - Summary of Property Plant and Equipment and Rental Equipment with Related Accumulated Depreciation (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Property Plant And Equipment [Line Items]    
Property and equipment $ 54,697 $ 45,678
Accumulated depreciation 23,640 15,956
Property and equipment, net 31,057 29,722
Equipment
   
Property Plant And Equipment [Line Items]    
Property and equipment 45,532 37,573
Accumulated depreciation 19,087 12,545
Property and equipment, net 26,445 25,028
Other property and equipment
   
Property Plant And Equipment [Line Items]    
Property and equipment 9,165 8,105
Accumulated depreciation 4,553 3,411
Property and equipment, net $ 4,612 $ 4,694