Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment reporting information profit (loss)
Revenues	$ 821,371	$ 835,886	$ 1,658,011	$ 1,680,475
Reconciling items:
Interest, net	(27,600)	(20,799)	(53,276)	(40,100)
Restructuring charges and asset impairments, net	(26,927)	(26,076)	(29,009)	(33,009)
Gain from the sale of technology			6,085	0
Income before income taxes	53,853	93,238	150,402	192,902
Provision for income taxes	4,952	33,394	36,368	70,418
Loss from discontinued operations, net of tax	0	(1,660)	0	(1,660)
Net income	48,901	58,184	114,034	120,824
Operating Segments
Segment reporting information profit (loss)
EBIT	165,272	202,961	357,709	404,661
Segment Reconciling Items
Reconciling items:
Interest, net	(40,443)	(34,294)	(79,093)	(68,510)
Unallocated corporate expenses	(50,134)	(48,777)	(105,290)	(106,544)
Restructuring charges and asset impairments, net	(26,927)	(26,076)	(29,009)	(33,009)
Gain from the sale of technology	6,085	0	6,085	0
Acquisition and disposition-related expenses	0	(576)	0	(3,696)
Small & Medium Business Solutions
Segment reporting information profit (loss)
Revenues	436,418	450,799	885,054	927,238
Small & Medium Business Solutions \| Operating Segments
Segment reporting information profit (loss)
EBIT	134,846	159,365	289,123	331,372
Small & Medium Business Solutions \| North America Mailing
Segment reporting information profit (loss)
Revenues	341,096	343,218	696,674	714,671
EBIT	120,877	146,897	261,885	307,728
Small & Medium Business Solutions \| International Mailing
Segment reporting information profit (loss)
Revenues	95,322	107,581	188,380	212,567
EBIT	13,969	12,468	27,238	23,644
Enterprise Business Solutions
Segment reporting information profit (loss)
Revenues	204,022	211,639	425,654	426,460
EBIT	26,901	34,128	66,582	69,862
Enterprise Business Solutions \| Production Mail
Segment reporting information profit (loss)
Revenues	85,570	95,874	174,525	183,299
EBIT	7,631	12,914	16,595	19,738
Enterprise Business Solutions \| Presort Services
Segment reporting information profit (loss)
Revenues	118,452	115,765	251,129	243,161
EBIT	19,270	21,214	49,987	50,124
Digital Commerce Solutions
Segment reporting information profit (loss)
Revenues	180,931	173,448	347,303	326,777
EBIT	3,525	9,468	2,004	3,427
Digital Commerce Solutions \| Software Solutions
Segment reporting information profit (loss)
Revenues	86,425	90,464	164,645	168,386
EBIT	7,555	10,151	10,304	7,579
Digital Commerce Solutions \| Global Ecommerce
Segment reporting information profit (loss)
Revenues	94,506	82,984	182,658	158,391
EBIT	$ (4,030)	$ (683)	$ (8,300)	$ (4,152)

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