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Summary of Significant Accounting Policies (Acquisitions Narrative) (Details)
€ in Thousands, $ in Thousands
 1 Months Ended 11 Months Ended 12 Months Ended
Jan. 31, 2017
EUR (€)
Jan. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Jan. 31, 2017
USD ($)
Business Acquisition [Line Items]          
Earn-out consideration       $ 20,746  
Post-acquisition sales     $ 65,045    
Post-acquisition net income (loss)     $ 3,317    
Orlaco [Member]          
Business Acquisition [Line Items]          
Business acquisition, cash paid for acquired entity € 74,939 $ 79,675      
Cash paid to seller at closing 67,439       $ 71,701
Aquisition payment held in escrow to secure payment for working capital and other adustments € 7,500       7,974
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Liabilites       212  
Increase in inventory       265  
Increase in intangible assets       113  
Increase (decrease) in accounts receivable       (201)  
Earn-out consideration       29  
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Long Term Assets       684  
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Long Term Liabilities       563  
Increase (decrease) in earn-out consideration       (1,007)  
Identifiable intangible assets         38,739
Deferred tax liabilities acquired         10,206
Increase (decrease) in goodwill       (1,078)  
Acquisition related costs       1,259  
Expense related to fair value adjustment for earn-out consideration       4,853  
Orlaco [Member] | Fair Value Adjustment To Inventory [Member]          
Business Acquisition [Line Items]          
Expense related to inventory fair value step up       $ 1,636  
Customer Lists [Member] | Orlaco [Member]          
Business Acquisition [Line Items]          
Identifiable intangible assets         27,518
Intangible asset useful life       15 years  
Trademarks [Member] | Orlaco [Member]          
Business Acquisition [Line Items]          
Identifiable intangible assets         5,142
Intangible asset useful life       20 years  
Technology Based Intangible Assets [Member] | Orlaco [Member]          
Business Acquisition [Line Items]          
Identifiable intangible assets         $ 6,079
Intangible asset useful life 7 years 7 years