Segment Information (Revenues) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenue	$ 3,266,348	$ 3,538,042	$ 3,673,561
United States
Segment Reporting Information [Line Items]
Revenue	2,899,502	3,065,211	3,114,905
Outside United States
Segment Reporting Information [Line Items]
Revenue	366,846	472,831	558,656
Global Ecommerce
Segment Reporting Information [Line Items]
Total from contracts with customers	1,355,326	1,576,348	1,702,580
Presort Services
Segment Reporting Information [Line Items]
Total from contracts with customers	617,599	602,016	573,480
SendTech Solutions
Segment Reporting Information [Line Items]
Total from contracts with customers	$ 1,293,423	$ 1,359,678	$ 1,397,501