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Definite- and Indefinite-Lived Intangible Assets (Schedule of Definite and Indefinite Lived Intangible Assets) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by Major Class [Line Items]    
Definite: $ 58,912 $ 52,690
Less accumulated amortization (11,540) (8,152)
Total net 47,372 44,538
Intangible assets, net 52,872 50,038
Trade names and trademarks    
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by Major Class [Line Items]    
Indefinite: $ 5,500 5,500
Trade names and trademarks    
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by Major Class [Line Items]    
Estimated Useful Lives 25 years  
Definite: $ 25,574 21,914
Less accumulated amortization (3,243)  
Customer and dealer relationships    
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by Major Class [Line Items]    
Definite: 31,356 28,822
Less accumulated amortization (7,699)  
Patents and drawings    
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by Major Class [Line Items]    
Definite: 1,982 $ 1,954
Less accumulated amortization $ (598)  
Minimum    
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by Major Class [Line Items]    
Estimated Useful Lives 3 years  
Minimum | Customer and dealer relationships    
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by Major Class [Line Items]    
Estimated Useful Lives 10 years  
Minimum | Patents and drawings    
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by Major Class [Line Items]    
Estimated Useful Lives 3 years  
Maximum    
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by Major Class [Line Items]    
Estimated Useful Lives 25 years  
Maximum | Customer and dealer relationships    
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by Major Class [Line Items]    
Estimated Useful Lives 14 years  
Maximum | Patents and drawings    
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by Major Class [Line Items]    
Estimated Useful Lives 12 years