Goodwill and Other Intangible Assets (Goodwill by Reportable Segment) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($)
Goodwill [Roll Forward]
Balance as of the year ended	$ 173,409
Foreign currency translation	196
Balance as of the period ended	173,605
Envelope [Member]
Goodwill [Roll Forward]
Balance as of the year ended	21,633
Foreign currency translation	0
Balance as of the period ended	21,633
Print [Member]
Goodwill [Roll Forward]
Balance as of the year ended	42,499
Foreign currency translation	196
Balance as of the period ended	42,695
Label [Member]
Goodwill [Roll Forward]
Balance as of the year ended	109,277
Foreign currency translation	0
Balance as of the period ended	$ 109,277