Revenue (Disaggregates of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	$ 875,449	$ 891,898	$ 2,689,849	$ 2,525,658
Total consolidated revenue	875,449	891,898	2,689,849	2,525,658
ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	728,097	726,043	2,221,816	2,045,316
Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	81,205	73,602	236,016	210,726
Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	646,892	652,441	1,985,800	1,834,590
Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	728,097	726,043	2,221,816	2,045,316
Revenue from leasing transactions and financing	147,352	165,855	468,033	480,342
Total consolidated revenue	875,449	891,898	2,689,849	2,525,658
Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	551,384	550,954	1,688,860	1,524,323
Revenue from leasing transactions and financing	0	0	0	0
Total consolidated revenue	551,384	550,954	1,688,860	1,524,323
Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services	113,413	117,519	347,266	353,320
Revenue from leasing transactions and financing	0	0	0	0
Total consolidated revenue	113,413	117,519	347,266	353,320
Financing
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	71,936	86,218	223,201	260,758
Total consolidated revenue	71,936	86,218	223,201	260,758
Equipment sales
Disaggregation of Revenue [Line Items]
Revenue from products and services	25,089	17,935	66,600	49,556
Revenue from leasing transactions and financing	58,145	61,637	189,704	164,126
Total consolidated revenue	83,234	79,572	256,304	213,682
Supplies
Disaggregation of Revenue [Line Items]
Revenue from products and services	38,211	39,635	119,090	118,117
Revenue from leasing transactions and financing	0	0	0	0
Total consolidated revenue	38,211	39,635	119,090	118,117
Rentals
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	17,271	18,000	55,128	55,458
Total consolidated revenue	17,271	18,000	55,128	55,458
Global Ecommerce
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	398,011	409,981	1,229,526	1,100,757
Global Ecommerce | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	398,011	409,981	1,229,526	1,100,757
Global Ecommerce | Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Global Ecommerce | Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	398,011	409,981	1,229,526	1,100,757
Global Ecommerce | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	398,011	409,981	1,229,526	1,100,757
Global Ecommerce | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	398,011	409,981	1,229,526	1,100,757
Global Ecommerce | Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Global Ecommerce | Financing
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	0	0	0	0
Global Ecommerce | Equipment sales
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	0	0	0	0
Global Ecommerce | Supplies
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Global Ecommerce | Rentals
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	0	0	0	0
Presort Services
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	139,296	127,705	417,041	386,552
Presort Services | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	139,296	127,705	417,041	386,552
Presort Services | Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Presort Services | Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	139,296	127,705	417,041	386,552
Presort Services | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	139,296	127,705	417,041	386,552
Presort Services | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	139,296	127,705	417,041	386,552
Presort Services | Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Presort Services | Financing
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	0	0	0	0
Presort Services | Equipment sales
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	0	0	0	0
Presort Services | Supplies
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Presort Services | Rentals
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	0	0	0	0
SendTech Solutions
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	338,142	354,212	1,043,282	1,038,349
SendTech Solutions | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	190,790	188,357	575,249	558,007
SendTech Solutions | Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	81,205	73,602	236,016	210,726
SendTech Solutions | Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	109,585	114,755	339,233	347,281
SendTech Solutions | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	190,790	188,357	575,249	558,007
SendTech Solutions | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	14,077	13,268	42,293	37,014
SendTech Solutions | Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services	113,413	117,519	347,266	353,320
SendTech Solutions | Financing
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	71,936	86,218	223,201	260,758
SendTech Solutions | Equipment sales
Disaggregation of Revenue [Line Items]
Revenue from products and services	25,089	17,935	66,600	49,556
Revenue from leasing transactions and financing	58,145	61,637	189,704	164,126
SendTech Solutions | Supplies
Disaggregation of Revenue [Line Items]
Revenue from products and services	38,211	39,635	119,090	118,117
SendTech Solutions | Rentals
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	$ 17,271	$ 18,000	$ 55,128	$ 55,458