Revenue (Disaggregates of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	$ 837,492	$ 788,573	$ 1,633,760	$ 1,583,657
Total consolidated revenue	837,492	788,573	1,633,760	1,583,657
ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	690,041	611,542	1,319,273	1,218,932
Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	58,750	82,790	137,124	169,666
Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	631,291	528,752	1,182,149	1,049,266
Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	690,041	611,542	1,319,273	1,218,932
Revenue from leasing transactions and financing	147,451	177,031	314,487	364,725
Total consolidated revenue	837,492	788,573	1,633,760	1,583,657
Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	528,990	417,963	973,369	824,508
Revenue from leasing transactions and financing	0	0	0	0
Total consolidated revenue	528,990	417,963	973,369	824,508
Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services	113,786	127,705	235,801	256,304
Revenue from leasing transactions and financing	0	0	0	0
Total consolidated revenue	113,786	127,705	235,801	256,304
Financing
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	85,462	92,419	174,540	189,462
Total consolidated revenue	85,462	92,419	174,540	189,462
Equipment sales
Disaggregation of Revenue [Line Items]
Revenue from products and services	14,492	19,384	31,621	40,677
Revenue from leasing transactions and financing	43,345	66,167	102,489	134,661
Total consolidated revenue	57,837	85,551	134,110	175,338
Supplies
Disaggregation of Revenue [Line Items]
Revenue from products and services	32,773	46,490	78,482	97,443
Revenue from leasing transactions and financing	0	0	0	0
Total consolidated revenue	32,773	46,490	78,482	97,443
Rentals
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	18,644	18,445	37,458	40,602
Total consolidated revenue	18,644	18,445	37,458	40,602
Global Ecommerce
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	398,453	282,319	690,776	548,573
Global Ecommerce | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	398,453	282,319	690,776	548,573
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	398,453	282,319	690,776	548,573
Global Ecommerce | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	398,453	282,319	690,776	548,573
Global Ecommerce | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	398,453	282,319	690,776	548,573
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	118,127	128,138	258,847	262,985
Presort Services | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	118,127	128,138	258,847	262,985
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	118,127	128,138	258,847	262,985
Presort Services | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	118,127	128,138	258,847	262,985
Presort Services | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	118,127	128,138	258,847	262,985
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	320,912	378,116	684,137	772,099
SendTech Solutions | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	173,461	201,085	369,650	407,374
SendTech Solutions | Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	58,750	82,790	137,124	169,666
SendTech Solutions | Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	114,711	118,295	232,526	237,708
SendTech Solutions | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	173,461	201,085	369,650	407,374
SendTech Solutions | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	12,410	7,506	23,746	12,950
SendTech Solutions | Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services	113,786	127,705	235,801	256,304
SendTech Solutions | Financing
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	85,462	92,419	174,540	189,462
SendTech Solutions | Equipment sales
Disaggregation of Revenue [Line Items]
Revenue from products and services	14,492	19,384	31,621	40,677
Revenue from leasing transactions and financing	43,345	66,167	102,489	134,661
SendTech Solutions | Supplies
Disaggregation of Revenue [Line Items]
Revenue from products and services	32,773	46,490	78,482	97,443
SendTech Solutions | Rentals
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	$ 18,644	$ 18,445	$ 37,458	$ 40,602