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Restructuring and Other Charges (Narrative) (Details)
$ in Thousands
Sep. 30, 2017
USD ($)
facility
restructuring_plan
Restructuring Cost and Reserve [Line Items]  
Number of active restructuring plans (restructuring plan) | restructuring_plan 2
Restructuring reserve $ 23,264
Restructuring reserve, current 4,000
Restructuring reserve, noncurrent $ 19,300
Envelope [Member]  
Restructuring Cost and Reserve [Line Items]  
Number of facilities closed (facility) | facility 1
Print [Member]  
Restructuring Cost and Reserve [Line Items]  
Number of facilities closed (facility) | facility 1