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Acquisition of Orlaco (Narrative) (Details)
€ in Thousands
1 Months Ended 3 Months Ended
Jan. 31, 2017
EUR (€)
Jan. 31, 2017
USD ($)
Mar. 31, 2018
USD ($)
Mar. 31, 2017
USD ($)
Jan. 31, 2017
USD ($)
Business Acquisition [Line Items]          
Acquisition related costs     $ 0    
Orlaco [Member]          
Business Acquisition [Line Items]          
Acquisition agreement date     Jan. 31, 2017    
Total cash paid at closing € 74,939 $ 79,675,000      
Cash paid to seller at closing 67,439       $ 71,701,000
Aquisition payment held in escrow to secure payment for working capital and other adustments 7,500       7,974,000
Intangible assets aquired         38,739,000
Acquisition related costs       $ 12,149,000  
Post-acquisition sales       11,100,000  
Post-acquisition net income (loss)       600,000  
Expense related to fair value adjustment for earn-out consideration     $ 369,000    
Orlaco [Member] | Earnout Consideration [Member]          
Business Acquisition [Line Items]          
Maximum additional earnout consideration | € € 7,500        
Orlaco [Member] | Fair Value Adjustment to Inventory [Member]          
Business Acquisition [Line Items]          
Expense related to inventory fair value step up       $ 979,000  
Customer Lists [Member] | Orlaco [Member]          
Business Acquisition [Line Items]          
Intangible assets aquired         27,518,000
Intangible asset useful life 15 years 15 years      
Trademarks [Member] | Orlaco [Member]          
Business Acquisition [Line Items]          
Intangible assets aquired         5,142,000
Intangible asset useful life 20 years 20 years      
Technology [Member] | Orlaco [Member]          
Business Acquisition [Line Items]          
Intangible assets aquired         $ 6,079,000
Intangible asset useful life 7 years 7 years