Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Segment reporting information profit (loss)
Revenue	$ 868,402	$ 896,583
Reconciling items:
Interest, net	(27,602)	(32,014)
Restructuring charges	(3,598)	(904)
Other expense	(17,710)	0
Income from continuing operations before taxes	6,872	70,278
Provision for income taxes	8,301	18,795
(Loss) income from discontinued operations, net of tax	(1,230)	8,487
Net (loss) income	(2,659)	59,970
Operating Segments
Segment reporting information profit (loss)
EBIT	124,561	166,397
Segment Reconciling Items
Reconciling items:
Interest, net	(38,966)	(43,078)
Unallocated corporate expenses	(55,689)	(51,082)
Restructuring charges	(3,598)	(904)
Other expense	(17,710)	0
Transaction costs	(1,726)	(1,055)
Commerce Services
Segment reporting information profit (loss)
Total from contracts with customers	401,101	381,048
Commerce Services \| Operating Segments
Segment reporting information profit (loss)
EBIT	466	19,315
Commerce Services \| Global Ecommerce
Segment reporting information profit (loss)
Total from contracts with customers	266,254	246,590
EBIT	(14,600)	(7,711)
Commerce Services \| Presort Services
Segment reporting information profit (loss)
Total from contracts with customers	134,847	134,458
EBIT	15,066	27,026
SMB Solutions
Segment reporting information profit (loss)
Total from contracts with customers	393,983	439,241
SMB Solutions \| Operating Segments
Segment reporting information profit (loss)
EBIT	122,403	144,590
SMB Solutions \| North America Mailing
Segment reporting information profit (loss)
Total from contracts with customers	315,474	340,811
EBIT	110,613	128,568
SMB Solutions \| International Mailing
Segment reporting information profit (loss)
Total from contracts with customers	78,509	98,430
EBIT	11,790	16,022
Software Solutions
Segment reporting information profit (loss)
Total from contracts with customers	73,318	76,294
Software Solutions \| Operating Segments
Segment reporting information profit (loss)
EBIT	$ 1,692	$ 2,492

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