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Other Intangible Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Acquired Finite-Lived Intangible Assets [Line Items]      
Indefinite life trademarks $ 23,252 $ 23,252  
Intangible Assets, Gross (Excluding Goodwill) 65,045 65,739  
Accumulated amortization - patents (9,805) (7,996)  
Total other intangible assets, net 55,240 57,743 [1]  
Asset impairment charge 0 8,800 [2],[3] $ 0 [2],[3]
Amortization expense for intangible assets 3,164 3,256 $ 3,554
2019 3,242    
2020 3,217    
2021 3,187    
2022 3,187    
2023 3,187    
Thereafter 15,968    
Finite-Lived Intangible Assets, Net 31,988    
Definite-lived trademarks      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible assets, gross 2,850 2,600  
Patents      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible assets, gross 14,243 15,187  
Customer relationships      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible assets, gross $ 24,700 $ 24,700  
Minimum | Definite-lived trademarks      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible asset, useful life 5 years    
Minimum | Patents      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible asset, useful life 7 years    
Minimum | Customer relationships      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible asset, useful life 10 years    
Maximum | Definite-lived trademarks      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible asset, useful life 15 years    
Maximum | Patents      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible asset, useful life 24 years    
Maximum | Customer relationships      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible asset, useful life 15 years    
[1] See Note 4.
[2] See Note 4.
[3] See Note 4.