Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Property (Details)

v3.3.1.900
Summary of Significant Accounting Policies - Property (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Property, plant and equipment      
Depreciation expense $ 4,919 $ 3,422 $ 3,068
Repairs and maintenance expenses $ 5,272 $ 4,682 $ 3,509
Land improvements and buildings | Minimum      
Property, plant and equipment      
Estimated useful lives 15 years    
Land improvements and buildings | Maximum      
Property, plant and equipment      
Estimated useful lives 40 years    
Leasehold Improvements      
Property, plant and equipment      
Estimated useful lives 12 years    
Machinery and equipment | Minimum      
Property, plant and equipment      
Estimated useful lives 3 years    
Machinery and equipment | Maximum      
Property, plant and equipment      
Estimated useful lives 20 years    
Furniture and fixtures | Minimum      
Property, plant and equipment      
Estimated useful lives 3 years    
Furniture and fixtures | Maximum      
Property, plant and equipment      
Estimated useful lives 12 years    
Mobile equipment and other | Minimum      
Property, plant and equipment      
Estimated useful lives 3 years    
Mobile equipment and other | Maximum      
Property, plant and equipment      
Estimated useful lives 10 years