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Restructurings (Schedule of Outstanding Restructuring Liability) (Details) - USD ($)
$ in Thousands
12 Months Ended 28 Months Ended 46 Months Ended 82 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2016
Dec. 31, 2013
Dec. 31, 2016
Restructuring Reserve [Roll Forward]            
Restructuring liability at beginning of period $ 4,590 $ 10,791 $ 13,472      
Restructuring charge (recovery) 914 1,042 7,596     $ 62,834
Proceeds from sale of assets   1,325 299      
Other cash payments, net (4,573) (8,827) (10,236)      
Other items 1,009 259 (340)      
Restructuring liability at end of period 1,940 4,590 10,791 $ 1,940 $ 13,472 1,940
Employee Severance and Other Benefits [Member]            
Restructuring Reserve [Roll Forward]            
Restructuring charge (recovery)     5,775      
Facility Charges [Member]            
Restructuring Reserve [Roll Forward]            
Restructuring charge (recovery) 800 1,582        
Restructuring liability at end of period 1,900     1,900   1,900
Other [Member]            
Restructuring Reserve [Roll Forward]            
Restructuring charge (recovery)     344      
2010 Restructurings [Member] | Employee Severance and Other Benefits [Member]            
Restructuring Reserve [Roll Forward]            
Restructuring charge (recovery)         21,700  
2010 Restructurings [Member] | Facility Charges [Member]            
Restructuring Reserve [Roll Forward]            
Restructuring liability at beginning of period 4,087 9,454 13,460      
Restructuring charge (recovery) 902 757 1,626     32,517
Proceeds from sale of assets   0 0      
Other cash payments, net (4,039) (6,449) (5,644)      
Other items 975 325 12      
Restructuring liability at end of period 1,925 4,087 9,454 1,925 13,460 1,925
2010 Restructurings [Member] | Other [Member]            
Restructuring Reserve [Roll Forward]            
Restructuring liability at beginning of period 0 0 12      
Restructuring charge (recovery) 0 0 (117)     23,933
Proceeds from sale of assets   0 199      
Other cash payments, net 0 0 (8)      
Other items 0 0 (86)      
Restructuring liability at end of period 0 0 0 0 12 0
2014 Restructuring [Member] | Employee Severance and Other Benefits [Member]            
Restructuring Reserve [Roll Forward]            
Restructuring liability at beginning of period 0 1,290 0      
Restructuring charge (recovery) 0 (269)   5,506    
Proceeds from sale of assets   0 0      
Other cash payments, net 0 (1,021) (4,507)      
Other items 0 0 22      
Restructuring liability at end of period 0 0 1,290 0 0 0
2014 Restructuring [Member] | Facility Charges [Member]            
Restructuring Reserve [Roll Forward]            
Restructuring liability at beginning of period 503 0 0      
Restructuring charge (recovery) 12   65 1,659    
Proceeds from sale of assets   0 0      
Other cash payments, net (500) (1,357) (65)      
Other items 0 278 0      
Restructuring liability at end of period 15 503 0 15 0 15
2014 Restructuring [Member] | Other [Member]            
Restructuring Reserve [Roll Forward]            
Restructuring liability at beginning of period 0 47 0      
Restructuring charge (recovery) 0 (1,028) 247 (781)    
Proceeds from sale of assets   1,325 100      
Other cash payments, net (34) 0 (12)      
Other items 34 (344) (288)      
Restructuring liability at end of period $ 0 $ 0 $ 47 $ 0 $ 0 $ 0