Revenue (Disaggregates of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	$ 790,125	$ 760,281	$ 2,373,782	$ 2,354,108
Total consolidated revenue	790,125	760,281	2,373,782	2,354,108
ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	609,255	573,679	1,828,187	1,769,143
Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	63,880	70,831	202,000	230,335
Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	545,375	502,848	1,626,187	1,538,808
Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	609,255	573,679	1,828,187	1,769,143
Revenue from leasing transactions and financing	180,870	186,602	545,595	584,965
Total consolidated revenue	790,125	760,281	2,373,782	2,354,108
Equipment sales
Disaggregation of Revenue [Line Items]
Revenue from products and services	19,062	20,428	59,739	64,482
Revenue from leasing transactions and financing	70,556	68,371	205,217	224,836
Total consolidated revenue	89,618	88,799	264,956	289,318
Supplies
Disaggregation of Revenue [Line Items]
Revenue from products and services	44,818	50,403	142,261	165,853
Revenue from leasing transactions and financing	0	0	0	0
Total consolidated revenue	44,818	50,403	142,261	165,853
Rentals
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	19,737	21,432	60,339	65,852
Total consolidated revenue	19,737	21,432	60,339	65,852
Financing
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	90,577	96,799	280,039	294,277
Total consolidated revenue	90,577	96,799	280,039	294,277
Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services	126,274	138,055	382,578	417,303
Revenue from leasing transactions and financing	0	0	0	0
Total consolidated revenue	126,274	138,055	382,578	417,303
Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	419,101	364,793	1,243,609	1,121,505
Revenue from leasing transactions and financing	0	0	0	0
Total consolidated revenue	419,101	364,793	1,243,609	1,121,505
Global Ecommerce
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	278,995	232,845	827,568	718,535
Global Ecommerce | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	278,995	232,845	827,568	718,535
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	278,995	232,845	827,568	718,535
Global Ecommerce | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	278,995	232,845	827,568	718,535
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
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 | Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Global Ecommerce | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	278,995	232,845	827,568	718,535
Presort Services
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	131,483	125,334	394,468	382,522
Presort Services | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	131,483	125,334	394,468	382,522
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	131,483	125,334	394,468	382,522
Presort Services | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	131,483	125,334	394,468	382,522
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
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 | Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Presort Services | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	131,483	125,334	394,468	382,522
SendTech Solutions
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	379,647	402,102	1,151,746	1,253,051
SendTech Solutions | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	198,777	215,500	606,151	668,086
SendTech Solutions | Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	63,880	70,831	202,000	230,335
SendTech Solutions | Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	134,897	144,669	404,151	437,751
SendTech Solutions | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	198,777	215,500	606,151	668,086
SendTech Solutions | Equipment sales
Disaggregation of Revenue [Line Items]
Revenue from products and services	19,062	20,428	59,739	64,482
Revenue from leasing transactions and financing	70,556	68,371	205,217	224,836
SendTech Solutions | Supplies
Disaggregation of Revenue [Line Items]
Revenue from products and services	44,818	50,403	142,261	165,853
SendTech Solutions | Rentals
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	19,737	21,432	60,339	65,852
SendTech Solutions | Financing
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	90,577	96,799	280,039	294,277
SendTech Solutions | Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services	126,274	138,055	382,578	417,303
SendTech Solutions | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	$ 8,623	$ 6,614	$ 21,573	$ 20,448