Revenue (Disaggregates of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing									$ 3,673,561	$ 3,554,075	$ 3,205,125
Revenue	$ 983,712	$ 875,449	$ 899,203	$ 915,197	$ 1,028,417	$ 891,898	$ 837,492	$ 796,268	3,673,561	3,554,075	3,205,125
ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services									3,046,015	2,898,540	2,484,837
Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services									318,077	293,648	334,046
Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services									2,727,938	2,604,892	2,150,791
Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services									2,334,674	2,191,306	1,710,801
Revenue from leasing transactions and financing									0	0	0
Revenue									2,334,674	2,191,306	1,710,801
Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services									460,888	473,292	506,187
Revenue from leasing transactions and financing									0	0	0
Revenue									460,888	473,292	506,187
Financing
Disaggregation of Revenue [Line Items]
Revenue from products and services									0	0	0
Revenue from leasing transactions and financing									294,418	341,034	368,090
Revenue									294,418	341,034	368,090
Equipment sales
Disaggregation of Revenue [Line Items]
Revenue from products and services									91,015	74,660	80,562
Revenue from leasing transactions and financing									259,123	240,222	271,542
Revenue									350,138	314,882	352,104
Supplies
Disaggregation of Revenue [Line Items]
Revenue from products and services									159,438	159,282	187,287
Revenue from leasing transactions and financing									0	0	0
Revenue									159,438	159,282	187,287
Rentals
Disaggregation of Revenue [Line Items]
Revenue from products and services									0	0	0
Revenue from leasing transactions and financing									74,005	74,279	80,656
Revenue									74,005	74,279	80,656
Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services									3,046,015	2,898,540	2,484,837
Revenue from leasing transactions and financing									627,546	655,535	720,288
Revenue									3,673,561	3,554,075	3,205,125
Global Ecommerce
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing									1,702,580	1,618,897	1,151,510
Global Ecommerce | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services									1,702,580	1,618,897	1,151,510
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
Global Ecommerce | Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services									1,702,580	1,618,897	1,151,510
Global Ecommerce | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services									1,702,580	1,618,897	1,151,510
Global Ecommerce | Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services									0	0	0
Global Ecommerce | Financing
Disaggregation of Revenue [Line Items]
Revenue from products and services									0	0	0
Revenue from leasing transactions and financing									0	0	0
Global Ecommerce | Equipment sales
Disaggregation of Revenue [Line Items]
Revenue from products and services									0	0	0
Revenue from leasing transactions and financing									0	0	0
Global Ecommerce | Supplies
Disaggregation of Revenue [Line Items]
Revenue from products and services									0	0	0
Global Ecommerce | Rentals
Disaggregation of Revenue [Line Items]
Revenue from products and services									0	0	0
Revenue from leasing transactions and financing									0	0	0
Global Ecommerce | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services									1,702,580	1,618,897	1,151,510
Presort Services
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing									573,480	521,212	529,588
Presort Services | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services									573,480	521,212	529,588
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
Presort Services | Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services									573,480	521,212	529,588
Presort Services | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services									573,480	521,212	529,588
Presort Services | Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services									0	0	0
Presort Services | Financing
Disaggregation of Revenue [Line Items]
Revenue from products and services									0	0	0
Revenue from leasing transactions and financing									0	0	0
Presort Services | Equipment sales
Disaggregation of Revenue [Line Items]
Revenue from products and services									0	0	0
Revenue from leasing transactions and financing									0	0	0
Presort Services | Supplies
Disaggregation of Revenue [Line Items]
Revenue from products and services									0	0	0
Presort Services | Rentals
Disaggregation of Revenue [Line Items]
Revenue from products and services									0	0	0
Revenue from leasing transactions and financing									0	0	0
Presort Services | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services									573,480	521,212	529,588
SendTech Solutions
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing									1,397,501	1,413,966	1,524,027
SendTech Solutions | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services									769,955	758,431	803,739
SendTech Solutions | Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services									318,077	293,648	334,046
SendTech Solutions | Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services									451,878	464,783	469,693
SendTech Solutions | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services									58,614	51,197	29,703
SendTech Solutions | Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services									460,888	473,292	506,187
SendTech Solutions | Financing
Disaggregation of Revenue [Line Items]
Revenue from products and services									0	0	0
Revenue from leasing transactions and financing									294,418	341,034	368,090
SendTech Solutions | Equipment sales
Disaggregation of Revenue [Line Items]
Revenue from products and services									91,015	74,660	80,562
Revenue from leasing transactions and financing									259,123	240,222	271,542
SendTech Solutions | Supplies
Disaggregation of Revenue [Line Items]
Revenue from products and services									159,438	159,282	187,287
SendTech Solutions | Rentals
Disaggregation of Revenue [Line Items]
Revenue from products and services									0	0	0
Revenue from leasing transactions and financing									74,005	74,279	80,656
SendTech Solutions | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services									$ 769,955	$ 758,431	$ 803,739