Acquisition, Intangible Assets and Goodwill (Goodwill) (Details) $ in Thousands	9 Months Ended
Sep. 30, 2017 USD ($)
Goodwill
Goodwill	$ 1,571,335
Acquisitions	6,229
Foreign currency translation	39,404
Goodwill	1,616,968
North America Mailing
Goodwill
Goodwill	354,000
Acquisitions	0
Foreign currency translation	13,208
Goodwill	367,208
International Mailing
Goodwill
Goodwill	145,566
Acquisitions	0
Foreign currency translation	12,074
Goodwill	157,640
Production Mail
Goodwill
Goodwill	101,099
Acquisitions	0
Foreign currency translation	5,734
Goodwill	106,833
Presort Services
Goodwill
Goodwill	196,890
Acquisitions	6,229
Foreign currency translation	0
Goodwill	203,119
Software Solutions
Goodwill
Goodwill	501,591
Acquisitions	0
Foreign currency translation	8,388
Goodwill	509,979
Global Ecommerce
Goodwill
Goodwill	272,189
Acquisitions	0
Foreign currency translation	0
Goodwill	272,189
Small & Medium Business Solutions
Goodwill
Goodwill	499,566
Acquisitions	0
Foreign currency translation	25,282
Goodwill	524,848
Enterprise Business Solutions
Goodwill
Goodwill	297,989
Acquisitions	6,229
Foreign currency translation	5,734
Goodwill	309,952
Digital Commerce Solutions
Goodwill
Goodwill	773,780
Acquisitions	0
Foreign currency translation	8,388
Goodwill	$ 782,168

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

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