Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment reporting information profit (loss)
Revenues	$ 842,820	$ 839,031	$ 2,500,831	$ 2,519,506
Reconciling items:
Interest, net	(28,601)	(22,294)	(81,877)	(62,394)
Restructuring charges and asset impairments, net	(1,493)	(16,494)	(30,502)	(49,503)
Gain from the sale of technology			6,085	0
Income before income taxes	74,965	93,593	225,367	286,495
Provision for income taxes	17,607	23,197	53,975	93,615
Loss from discontinued operations, net of tax	0	(291)	0	(1,951)
Net income	57,358	70,105	171,392	190,929
Operating Segments
Segment reporting information profit (loss)
EBIT	162,218	197,916	519,927	602,577
Segment Reconciling Items
Reconciling items:
Interest, net	(41,230)	(35,259)	120,323	(103,769)
Unallocated corporate expenses	(38,848)	(51,992)	(144,138)	(158,536)
Restructuring charges and asset impairments, net	(1,493)	(16,494)	(30,502)	(49,503)
Gain from the sale of technology	0	0	6,085	0
Acquisition and disposition-related expenses	(5,682)	(578)	(5,682)	(4,274)
Small & Medium Business Solutions
Segment reporting information profit (loss)
Revenues	413,736	446,515	1,298,790	1,373,753
Small & Medium Business Solutions \| Operating Segments
Segment reporting information profit (loss)
EBIT	116,506	151,166	405,629	482,538
Small & Medium Business Solutions \| North America Mailing
Segment reporting information profit (loss)
Revenues	319,966	349,785	1,016,640	1,064,456
EBIT	107,777	141,968	369,662	449,696
Small & Medium Business Solutions \| International Mailing
Segment reporting information profit (loss)
Revenues	93,770	96,730	282,150	309,297
EBIT	8,729	9,198	35,967	32,842
Enterprise Business Solutions
Segment reporting information profit (loss)
Revenues	223,461	220,403	649,115	646,863
Enterprise Business Solutions \| Operating Segments
Segment reporting information profit (loss)
EBIT	34,394	34,877	100,976	104,739
Enterprise Business Solutions \| Production Mail
Segment reporting information profit (loss)
Revenues	104,387	106,350	278,912	289,649
EBIT	14,920	15,696	31,515	35,434
Enterprise Business Solutions \| Presort Services
Segment reporting information profit (loss)
Revenues	119,074	114,053	370,203	357,214
EBIT	19,474	19,181	69,461	69,305
Digital Commerce Solutions
Segment reporting information profit (loss)
Revenues	205,623	172,113	552,926	498,890
Digital Commerce Solutions \| Operating Segments
Segment reporting information profit (loss)
EBIT	11,318	11,873	13,322	15,300
Digital Commerce Solutions \| Software Solutions
Segment reporting information profit (loss)
Revenues	99,442	89,031	264,087	257,417
EBIT	20,912	10,329	31,216	17,908
Digital Commerce Solutions \| Global Ecommerce
Segment reporting information profit (loss)
Revenues	106,181	83,082	288,839	241,473
EBIT	$ (9,594)	$ 1,544	$ (17,894)	$ (2,608)

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