Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment reporting information profit (loss)
Revenue	$ 871,495		$ 899,203	$ 1,798,437	$ 1,814,400
Reconciliation of Segment EBIT to net income (loss):
Interest expense, net	(21,007)		(24,346)	(43,131)	(49,504)
Loss on debt redemption/refinancing		$ (5,000)	(989)	(4,993)	(52,383)
Gain on sale of business		$ 3,000	10,201	2,522	10,201
Gain on sale of assets			1,434	14,372	1,434
Benefit (provision) for income taxes	7,026		(4,915)	2,823	9,077
Income (loss) from continuing operations	4,336		20,876	25,157	(6,779)
Loss from discontinued operations, net of tax	0		(1,020)	0	(4,906)
Net income (loss)	4,336		19,856	25,157	(11,685)
Operating Segments
Segment reporting information profit (loss)
EBIT	79,591		112,424	190,102	219,569
Segment Reconciling Items
Reconciliation of Segment EBIT to net income (loss):
Unallocated corporate expenses	(40,761)		(56,316)	(98,595)	(113,781)
Restructuring charges	(4,224)		(4,844)	(8,408)	(7,733)
Interest expense, net	(33,540)		(36,119)	(67,266)	(73,163)
Loss on debt redemption/refinancing	0		(989)	(4,993)	(52,383)
Gain on sale of business	0		10,201	2,522	10,201
Gain on sale of assets	0		1,434	14,372	1,434
Transaction costs	(3,756)		0	(5,400)	0
Benefit (provision) for income taxes	7,026		(4,915)	2,823	9,077
Global Ecommerce
Reconciliation of Segment EBIT to net income (loss):
Increase (decrease) in transportation costs	3,000			7,000
Presort Services
Reconciliation of Segment EBIT to net income (loss):
Increase (decrease) in transportation costs	(3,000)			(7,000)
Digital Commerce Solutions | Global Ecommerce
Segment reporting information profit (loss)
Revenue from contracts with customers	393,770		418,429	812,297	831,515
EBIT	(28,825)		(10,831)	(42,521)	(37,207)
Digital Commerce Solutions | Presort Services
Segment reporting information profit (loss)
Revenue from contracts with customers	138,934		134,619	299,478	277,745
EBIT	12,851		16,134	32,483	35,185
SendTech Solutions
Segment reporting information profit (loss)
Revenue from contracts with customers	338,791		346,155	686,662	705,140
SendTech Solutions | Operating Segments
Segment reporting information profit (loss)
EBIT	$ 95,565		$ 107,121	$ 200,140	$ 221,591