Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Other Intangible Assets (Narrative) (Details)

v3.8.0.1
Other Intangible Assets (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]      
Impairment charges $ 2,200    
Amortization of intangible assets 35,000 $ 59,000 $ 75,000
Decrease in amortization expense 20,500    
Decrease in net loss $ 18,300    
Decrease in basic and diluted loss per share $ 0.35    
Other Intangible Assets [Member]      
Finite-Lived Intangible Assets [Line Items]      
Impairment charges   16,900 260,300
Other Intangible Assets [Member] | Cost Of Sales [Member]      
Finite-Lived Intangible Assets [Line Items]      
Impairment charges   1,800 191,200
Other Intangible Assets [Member] | Selling, General and Administrative Expenses [Member]      
Finite-Lived Intangible Assets [Line Items]      
Impairment charges   15,100 $ 68,800
In-process Research and Development [Member]      
Finite-Lived Intangible Assets [Line Items]      
Impairment charges of definite-life intangibles assets   1,000  
Impairment charges   $ 18,200  
Finite-Lived Intangible Assets [Member] | Minimum [Member]      
Finite-Lived Intangible Assets [Line Items]      
Discount rate (as a percent)     13.00%
Finite-Lived Intangible Assets [Member] | Maximum [Member]      
Finite-Lived Intangible Assets [Line Items]      
Discount rate (as a percent)     14.00%