Segment Information (Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total assets	$ 3,168,951	$ 3,397,516	$ 4,272,185
Cash and cash equivalents	284,887	469,726	600,054
Short-term investments	12,232	16,374	22,166
Long-term investments	204,876	190,436	250,240
Other corporate assets	217,769	260,807	285,328
Assets of discontinued operations	0	0	532,441
Identifiable long-lived assets	316,963	356,600	404,153
United States
Segment Reporting Information [Line Items]
Identifiable long-lived assets	303,039	345,457	390,471
Outside United States
Segment Reporting Information [Line Items]
Identifiable long-lived assets	13,924	11,143	13,682
Operating Segments
Segment Reporting Information [Line Items]
Total assets	2,449,187	2,460,173	2,581,956
Operating Segments | SendTech Solutions
Segment Reporting Information [Line Items]
Total assets	1,963,310	1,981,753	2,081,199
Operating Segments | Presort Services
Segment Reporting Information [Line Items]
Total assets	$ 485,877	$ 478,420	$ 500,757