Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment reporting information profit (loss)
Revenue	$ 875,449	$ 891,898	$ 2,689,849	$ 2,525,658
Reconciliation of Segment EBIT to net income (loss):
Restructuring charges			(11,434)	(12,505)
Interest expense, net	(24,312)	(27,175)	(73,816)	(79,504)
Gain on sale of assets			1,434	21,969
Goodwill impairment	0	0	0	(198,169)
Loss on debt refinancing	(3,193)	0	(55,576)	(36,987)
Gain on sale of business	0	0	10,201	0
Benefit (provision) for income taxes	1,525	(554)	10,602	(7,540)
Income (loss) from continuing operations	8,495	10,773	1,716	(208,071)
Income (loss) from discontinued operations, net of tax	572	616	(4,334)	7,648
Net income (loss)	9,067	11,389	(2,618)	(200,423)
Operating Segments
Segment reporting information profit (loss)
EBIT	99,062	107,323	318,631	298,061
Segment Reconciling Items
Reconciliation of Segment EBIT to net income (loss):
Unallocated corporate expenses	(49,176)	(53,429)	(162,957)	(146,640)
Restructuring charges	(3,701)	(3,766)	(11,434)	(12,505)
Interest expense, net	(36,022)	(38,801)	(109,185)	(115,558)
Gain on sale of assets	0	0	1,434	11,908
Goodwill impairment	0	0	0	(198,169)
Loss on debt refinancing	(3,193)	0	(55,576)	(36,987)
Gain on sale of business	0	0	10,201	0
Transaction costs	0	0	0	(641)
Benefit (provision) for income taxes	1,525	(554)	10,602	(7,540)
Digital Commerce Solutions | Global Ecommerce
Segment reporting information profit (loss)
Revenue from contracts with customers	398,011	409,981	1,229,526	1,100,757
EBIT	(20,950)	(19,757)	(58,157)	(68,126)
Reconciliation of Segment EBIT to net income (loss):
Goodwill impairment				(198,169)
Digital Commerce Solutions | Presort Services
Segment reporting information profit (loss)
Revenue from contracts with customers	139,296	127,705	417,041	386,552
EBIT	21,062	14,481	56,247	42,758
Reconciliation of Segment EBIT to net income (loss):
Goodwill impairment				0
SendTech Solutions
Segment reporting information profit (loss)
Revenue from contracts with customers	338,142	354,212	1,043,282	1,038,349
Reconciliation of Segment EBIT to net income (loss):
Goodwill impairment				0
SendTech Solutions | Operating Segments
Segment reporting information profit (loss)
EBIT	$ 98,950	$ 112,599	$ 320,541	$ 323,429