Segment Information (Revenues) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Total revenue	$ 499,463	$ 503,033	$ 1,510,477	$ 1,552,509
Operating Segments
Segment Reporting Information [Line Items]
Total from contracts with customers	479,130	479,492	1,443,387	1,444,821
Other
Segment Reporting Information [Line Items]
Total from contracts with customers	20,333	23,541	67,090	107,688
Total revenue	20,333	23,541	67,090	107,688
SendTech Solutions | Operating Segments
Segment Reporting Information [Line Items]
Total from contracts with customers	312,763	327,041	960,355	990,361
Total revenue	312,763	327,041	960,355	990,361
Presort Services | Operating Segments
Segment Reporting Information [Line Items]
Total from contracts with customers	166,367	152,451	483,032	454,460
Total revenue	$ 166,367	$ 152,451	$ 483,032	$ 454,460