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Goodwill and Intangible Assets Intangible Assests (Excluding Goodwill) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]      
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)     $ 11,826
Impairment of Intangible Assets, Finite-lived     38,083
Finite-Lived Intangible Assets, Gross [1],[2] $ 178,531   178,059
Finite-Lived Intangible Assets, Accumulated Amortization [1],[2] (110,297)   (107,046)
Amortization 3,128 $ 4,404  
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 11,800    
Finite-Lived Intangible Assets, Amortization Expense, Year Two 10,500    
Finite-Lived Intangible Assets, Amortization Expense, Year Three 9,800    
Finite-Lived Intangible Assets, Amortization Expense, Year Four 9,800    
Finite-Lived Intangible Assets, Amortization Expense, Year Five 6,600    
Impairment of Long-Lived Assets Held-for-use     7,657
Trademarks and trade names      
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]      
Indefinite-Lived Intangible Assets (Excluding Goodwill) 35,754   35,701
Unpatented technology      
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 8,649   8,530
Finite-Lived Intangible Assets, Accumulated Amortization (2,884)   (2,660)
Patents      
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 7,789   7,770
Finite-Lived Intangible Assets, Accumulated Amortization (6,916)   (6,753)
Trademarks and trade names      
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 10,082   10,052
Finite-Lived Intangible Assets, Accumulated Amortization (6,994)   (6,886)
Customer Relationships [Member]      
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 138,463   138,223
Finite-Lived Intangible Assets, Accumulated Amortization (92,866)   (90,180)
Land use rights      
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 13,548   13,484
Finite-Lived Intangible Assets, Accumulated Amortization $ (637)   $ (567)
[1] Amounts include the impact of foreign currency translation. Fully amortized amounts are written off.
[2] The Company amortizes certain identifiable intangible assets mainly on a straight-line basis over their estimated useful lives, which range from one to 50 years.