Segment Information (Net Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Reconciliation of adjusted segment EBIT to net income or loss:
Interest expense, net	$ (27,766)	$ (22,342)
Restructuring charges	(4,315)	(3,599)
Gain on debt redemption	0	2,836
(Provision) benefit for income taxes	(12,559)	3,250
Net loss	(2,885)	(7,737)
Operating Segments
Segment Reporting Information [Line Items]
Adjusted EBIT	106,180	89,370
Segment Reconciling Items
Reconciliation of adjusted segment EBIT to net income or loss:
Interest expense, net	(44,369)	(36,878)
Unallocated corporate expenses	(49,770)	(56,349)
Restructuring charges	(4,315)	(3,599)
Proxy solicitation fees	0	(6,367)
Gain on debt redemption	0	2,836
Foreign currency gain on intercompany loans	4,638	0
Transaction costs	(2,690)	0
Global Ecommerce | Operating Segments
Segment Reporting Information [Line Items]
Adjusted EBIT	(35,427)	(33,172)
Presort Services | Operating Segments
Segment Reporting Information [Line Items]
Adjusted EBIT	40,329	26,905
SendTech Solutions | Operating Segments
Segment Reporting Information [Line Items]
Adjusted EBIT	$ 101,278	$ 95,637