Revenue (Disaggregates of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	$ 891,898	$ 790,125	$ 2,525,658	$ 2,373,782
Total consolidated revenue	891,898	790,125	2,525,658	2,373,782
ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	726,043	609,255	2,045,316	1,828,187
Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	73,602	81,547	210,726	251,214
Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	652,441	527,708	1,834,590	1,576,973
Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	726,043	609,255	2,045,316	1,828,187
Revenue from leasing transactions and financing	165,855	180,870	480,342	545,595
Total consolidated revenue	891,898	790,125	2,525,658	2,373,782
Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	550,954	419,101	1,524,323	1,243,609
Revenue from leasing transactions and financing	0	0	0	0
Total consolidated revenue	550,954	419,101	1,524,323	1,243,609
Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services	117,519	126,274	353,320	382,578
Revenue from leasing transactions and financing	0	0	0	0
Total consolidated revenue	117,519	126,274	353,320	382,578
Financing
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	86,218	90,577	260,758	280,039
Total consolidated revenue	86,218	90,577	260,758	280,039
Equipment sales
Disaggregation of Revenue [Line Items]
Revenue from products and services	17,935	19,062	49,556	59,739
Revenue from leasing transactions and financing	61,637	70,556	164,126	205,217
Total consolidated revenue	79,572	89,618	213,682	264,956
Supplies
Disaggregation of Revenue [Line Items]
Revenue from products and services	39,635	44,818	118,117	142,261
Revenue from leasing transactions and financing	0	0	0	0
Total consolidated revenue	39,635	44,818	118,117	142,261
Rentals
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	18,000	19,737	55,458	60,339
Total consolidated revenue	18,000	19,737	55,458	60,339
Global Ecommerce
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	409,981	278,995	1,100,757	827,568
Global Ecommerce | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	409,981	278,995	1,100,757	827,568
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	409,981	278,995	1,100,757	827,568
Global Ecommerce | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	409,981	278,995	1,100,757	827,568
Global Ecommerce | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	409,981	278,995	1,100,757	827,568
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	127,705	131,483	386,552	394,468
Presort Services | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	127,705	131,483	386,552	394,468
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	127,705	131,483	386,552	394,468
Presort Services | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	127,705	131,483	386,552	394,468
Presort Services | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	127,705	131,483	386,552	394,468
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	354,212	379,647	1,038,349	1,151,746
SendTech Solutions | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	188,357	198,777	558,007	606,151
SendTech Solutions | Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	73,602	81,547	210,726	251,214
SendTech Solutions | Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	114,755	117,230	347,281	354,937
SendTech Solutions | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	188,357	198,777	558,007	606,151
SendTech Solutions | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	13,268	8,623	37,014	21,573
SendTech Solutions | Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services	117,519	126,274	353,320	382,578
SendTech Solutions | Financing
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	86,218	90,577	260,758	280,039
SendTech Solutions | Equipment sales
Disaggregation of Revenue [Line Items]
Revenue from products and services	17,935	19,062	49,556	59,739
Revenue from leasing transactions and financing	61,637	70,556	164,126	205,217
SendTech Solutions | Supplies
Disaggregation of Revenue [Line Items]
Revenue from products and services	39,635	44,818	118,117	142,261
SendTech Solutions | Rentals
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	$ 18,000	$ 19,737	$ 55,458	$ 60,339