Revenue (Disaggregates of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	$ 899,203	$ 837,492	$ 1,814,400	$ 1,633,760
Total consolidated revenue	899,203	837,492	1,814,400	1,633,760
ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	743,227	690,041	1,493,719	1,319,273
Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	77,275	58,750	154,811	137,124
Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	665,952	631,291	1,338,908	1,182,149
Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	743,227	690,041	1,493,719	1,319,273
Revenue from leasing transactions and financing	155,976	147,451	320,681	314,487
Total consolidated revenue	899,203	837,492	1,814,400	1,633,760
Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	567,022	528,990	1,137,476	973,369
Revenue from leasing transactions and financing	0	0	0	0
Total consolidated revenue	567,022	528,990	1,137,476	973,369
Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services	115,156	113,786	233,853	235,801
Revenue from leasing transactions and financing	0	0	0	0
Total consolidated revenue	115,156	113,786	233,853	235,801
Financing
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	73,453	85,462	151,265	174,540
Total consolidated revenue	73,453	85,462	151,265	174,540
Equipment sales
Disaggregation of Revenue [Line Items]
Revenue from products and services	22,394	14,492	41,511	31,621
Revenue from leasing transactions and financing	63,873	43,345	131,559	102,489
Total consolidated revenue	86,267	57,837	173,070	134,110
Supplies
Disaggregation of Revenue [Line Items]
Revenue from products and services	38,655	32,773	80,879	78,482
Revenue from leasing transactions and financing	0	0	0	0
Total consolidated revenue	38,655	32,773	80,879	78,482
Rentals
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	18,650	18,644	37,857	37,458
Total consolidated revenue	18,650	18,644	37,857	37,458
Global Ecommerce
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	418,429	398,453	831,515	690,776
Global Ecommerce | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	418,429	398,453	831,515	690,776
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	418,429	398,453	831,515	690,776
Global Ecommerce | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	418,429	398,453	831,515	690,776
Global Ecommerce | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	418,429	398,453	831,515	690,776
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	134,619	118,127	277,745	258,847
Presort Services | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	134,619	118,127	277,745	258,847
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	134,619	118,127	277,745	258,847
Presort Services | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	134,619	118,127	277,745	258,847
Presort Services | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	134,619	118,127	277,745	258,847
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	346,155	320,912	705,140	684,137
SendTech Solutions | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	190,179	173,461	384,459	369,650
SendTech Solutions | Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	77,275	58,750	154,811	137,124
SendTech Solutions | Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	112,904	114,711	229,648	232,526
SendTech Solutions | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	190,179	173,461	384,459	369,650
SendTech Solutions | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	13,974	12,410	28,216	23,746
SendTech Solutions | Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services	115,156	113,786	233,853	235,801
SendTech Solutions | Financing
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	73,453	85,462	151,265	174,540
SendTech Solutions | Equipment sales
Disaggregation of Revenue [Line Items]
Revenue from products and services	22,394	14,492	41,511	31,621
Revenue from leasing transactions and financing	63,873	43,345	131,559	102,489
SendTech Solutions | Supplies
Disaggregation of Revenue [Line Items]
Revenue from products and services	38,655	32,773	80,879	78,482
SendTech Solutions | Rentals
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	$ 18,650	$ 18,644	$ 37,857	$ 37,458