Intangible Assets and Goodwill (Goodwill) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill
Goodwill before accumulated impairment			$ 1,350,454,000
Accumulated impairment	$ 0	$ 0	(198,169,000)	$ 0
Beginning balance		1,152,285,000	1,324,179,000
Acquisitions/dispositions		(2,396,000)	8,463,000
FX Impact		(14,786,000)	17,812,000
Ending balance	1,135,103,000	1,135,103,000	1,152,285,000	1,324,179,000
Digital Commerce Solutions | Global Ecommerce
Goodwill
Goodwill before accumulated impairment			609,431,000
Accumulated impairment			(198,169,000)
Beginning balance		411,262,000	609,431,000
Acquisitions/dispositions		(16,200,000)	0
FX Impact		0	0
Ending balance	395,062,000	395,062,000	411,262,000	609,431,000
Digital Commerce Solutions | Presort Services
Goodwill
Goodwill before accumulated impairment			220,992,000
Accumulated impairment			0
Beginning balance		220,992,000	212,529,000
Acquisitions/dispositions		0	8,463,000
FX Impact		0	0
Ending balance	220,992,000	220,992,000	220,992,000	212,529,000
SendTech Solutions
Goodwill
Goodwill before accumulated impairment			520,031,000
Accumulated impairment			0
Beginning balance		520,031,000	502,219,000
Acquisitions/dispositions		13,804,000	0
FX Impact		(14,786,000)	17,812,000
Ending balance	$ 519,049,000	$ 519,049,000	$ 520,031,000	$ 502,219,000