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Property, Plant and Equipment, Net (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment $ 140,050 $ 118,656
Accumulated depreciation and amortization (33,484) (31,646)
Net value of property and equipment 106,566 87,010
Land 19,774 16,970
Total property, plant and equipment, net 126,340 103,980
Building [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment 37,871 36,228
Machinery and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment 94,770 76,497
Office equipment and software [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment 4,347 2,868
Vehicles [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment 1,528 1,412
Furniture and fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment $ 1,534 $ 1,651