Intangible Assets and Goodwill (Goodwill) (Details) $ in Thousands	3 Months Ended
Mar. 31, 2017 USD ($)
Goodwill [Roll Forward]
Goodwill	$ 1,571,335
Acquisitions	6,229
Foreign currency translation	5,738
Goodwill	1,583,302
North America Mailing
Goodwill [Roll Forward]
Goodwill	354,000
Acquisitions	0
Foreign currency translation	1,402
Goodwill	355,402
International Mailing
Goodwill [Roll Forward]
Goodwill	145,566
Acquisitions	0
Foreign currency translation	1,587
Goodwill	147,153
Small & Medium Business Solutions
Goodwill [Roll Forward]
Goodwill	499,566
Acquisitions	0
Foreign currency translation	2,989
Goodwill	502,555
Production Mail
Goodwill [Roll Forward]
Goodwill	101,099
Acquisitions	0
Foreign currency translation	766
Goodwill	101,865
Presort Services
Goodwill [Roll Forward]
Goodwill	196,890
Acquisitions	6,229
Foreign currency translation	0
Goodwill	203,119
Enterprise Business Solutions
Goodwill [Roll Forward]
Goodwill	297,989
Acquisitions	6,229
Foreign currency translation	766
Goodwill	304,984
Software Solutions
Goodwill [Roll Forward]
Goodwill	501,591
Acquisitions	0
Foreign currency translation	1,983
Goodwill	503,574
Global Ecommerce
Goodwill [Roll Forward]
Goodwill	272,189
Acquisitions	0
Foreign currency translation	0
Goodwill	272,189
Digital Commerce Solutions
Goodwill [Roll Forward]
Goodwill	773,780
Acquisitions	0
Foreign currency translation	1,983
Goodwill	$ 775,763

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=64834752&loc=SL49117168-202975

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