Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment reporting information profit (loss)
Revenue	$ 915,197	$ 796,268
Reconciliation of Segment EBIT to net loss:
Expenses, net	2,889	3,817
Restructuring charges	(2,889)	(3,817)
Interest expense, net	(25,158)	(25,883)
Goodwill impairment	0	(198,169)
Loss on debt refinancing	(51,394)	(36,987)
Benefit for income taxes	13,992	10,030
Loss from continuing operations	(27,655)	(218,547)
(Loss) income from discontinued operations, net of tax	(3,886)	10,064
Net loss	(31,541)	(208,483)
Operating Segments
Segment reporting information profit (loss)
EBIT	107,145	92,782
Segment Reconciling Items
Reconciliation of Segment EBIT to net loss:
Unallocated corporate expenses	(57,465)	(43,722)
Expenses, net	2,889	3,817
Restructuring charges	(2,889)	(3,817)
Interest expense, net	(37,044)	(38,372)
Goodwill impairment	0	(198,169)
Loss on debt refinancing	(51,394)	(36,987)
Transaction costs	0	(292)
Benefit for income taxes	13,992	10,030
Digital Commerce Solutions | Global Ecommerce
Segment reporting information profit (loss)
Revenue from contracts with customers	413,086	292,323
EBIT	(26,376)	(29,475)
Reconciliation of Segment EBIT to net loss:
Goodwill impairment		(198,169)
Digital Commerce Solutions | Presort Services
Segment reporting information profit (loss)
Revenue from contracts with customers	143,126	140,720
EBIT	19,051	15,695
Reconciliation of Segment EBIT to net loss:
Goodwill impairment		0
SendTech Solutions
Segment reporting information profit (loss)
Revenue from contracts with customers	358,985	363,225
Reconciliation of Segment EBIT to net loss:
Goodwill impairment		0
SendTech Solutions | Operating Segments
Segment reporting information profit (loss)
EBIT	$ 114,470	$ 106,562