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Goodwill and Intangible Assets (Definite and Indefinite Lived Intangible Assets) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by Major Class [Line Items]          
Definite: $ 59,597   $ 59,597   $ 52,690
Less accumulated amortization (9,744)   (9,744)   (8,152)
Total net 49,853   49,853   44,538
Total Intangible Assets 55,353   55,353   50,038
Amortization of intangibles 777 $ 777 1,554 $ 1,549  
Intangible assets, net 55,353   $ 55,353   50,038
Total assets | Indefinite-lived and Finite-Lived Intangible Assets          
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by Major Class [Line Items]          
Percentage of total assets     8.00%    
Trade names and trademarks          
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by Major Class [Line Items]          
Indefinite: 5,500   $ 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: 25,288   $ 25,288   21,914
Customer and dealer relationships          
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by Major Class [Line Items]          
Estimated Useful Lives     14 years    
Definite: 32,335   $ 32,335   28,822
Patents and drawings          
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by Major Class [Line Items]          
Definite: $ 1,974   $ 1,974   $ 1,954
Patents and drawings | Minimum          
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by Major Class [Line Items]          
Estimated Useful Lives     3 years    
Patents and drawings | Maximum          
Schedule of Acquired Indefinite-lived and Finite Intangible Assets by Major Class [Line Items]          
Estimated Useful Lives     12 years