Revenue (Disaggregates of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	$ 868,402	$ 896,583
Total Consolidated Revenue	868,402	896,583
ASC 606
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	680,709	686,772
Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	93,218	107,204
Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	587,491	579,568
Sales And Services
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	680,709	686,772
Revenue from leasing transactions and financing	187,693	209,811
Total Consolidated Revenue	868,402	896,583
Equipment sales
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	21,294	22,211
Revenue from leasing transactions and financing	68,493	84,497
Total Consolidated Revenue	89,787	106,708
Supplies
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	50,953	59,993
Revenue from leasing transactions and financing	0	0
Total Consolidated Revenue	50,953	59,993
Software
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	73,318	76,294
Revenue from leasing transactions and financing	0	0
Total Consolidated Revenue	73,318	76,294
Rentals
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Revenue from leasing transactions and financing	22,157	24,965
Total Consolidated Revenue	22,157	24,965
Financing
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Revenue from leasing transactions and financing	97,043	100,349
Total Consolidated Revenue	97,043	100,349
Support services
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	128,621	140,650
Revenue from leasing transactions and financing	0	0
Total Consolidated Revenue	128,621	140,650
Business services
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	406,523	387,624
Revenue from leasing transactions and financing	0	0
Total Consolidated Revenue	406,523	387,624
Software Solutions
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	73,318	76,294
Revenue from leasing transactions and financing	73,318	76,294
Software Solutions | ASC 606
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	73,318	76,294
Software Solutions | Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	20,970	25,001
Software Solutions | Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	52,348	51,293
Software Solutions | Sales And Services
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	73,318	76,294
Software Solutions | Equipment sales
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Revenue from leasing transactions and financing	0	0
Software Solutions | Supplies
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Software Solutions | Software
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	73,318	76,294
Software Solutions | Rentals
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Revenue from leasing transactions and financing	0	0
Software Solutions | Financing
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Revenue from leasing transactions and financing	0	0
Software Solutions | Support services
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Software Solutions | Business services
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Global Ecommerce
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	266,254	246,590
Global Ecommerce | ASC 606
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	266,254	246,590
Global Ecommerce | Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Global Ecommerce | Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	266,254	246,590
Global Ecommerce | Sales And Services
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	266,254	246,590
Global Ecommerce | Equipment sales
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Revenue from leasing transactions and financing	0	0
Global Ecommerce | Supplies
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Global Ecommerce | Software
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Global Ecommerce | Rentals
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Revenue from leasing transactions and financing	0	0
Global Ecommerce | Financing
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Revenue from leasing transactions and financing	0	0
Global Ecommerce | Support services
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Global Ecommerce | Business services
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	266,254	246,590
Presort Services
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	134,847	134,458
Presort Services | ASC 606
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	134,847	134,458
Presort Services | Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Presort Services | Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	134,847	134,458
Presort Services | Sales And Services
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	134,847	134,458
Presort Services | Equipment sales
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Revenue from leasing transactions and financing	0	0
Presort Services | Supplies
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Presort Services | Software
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Presort Services | Rentals
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Revenue from leasing transactions and financing	0	0
Presort Services | Financing
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Revenue from leasing transactions and financing	0	0
Presort Services | Support services
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	22	0
Presort Services | Business services
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	134,825	134,458
North America Mailing
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	315,474	340,811
North America Mailing | ASC 606
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	156,544	167,969
North America Mailing | Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	44,318	49,367
North America Mailing | Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	112,226	118,602
North America Mailing | Sales And Services
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	156,544	167,969
North America Mailing | Equipment sales
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	9,215	10,416
Revenue from leasing transactions and financing	57,894	68,472
North America Mailing | Supplies
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	35,103	38,951
North America Mailing | Software
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
North America Mailing | Rentals
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Revenue from leasing transactions and financing	17,279	19,512
North America Mailing | Financing
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Revenue from leasing transactions and financing	83,757	84,858
North America Mailing | Support services
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	107,709	113,713
North America Mailing | Business services
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	4,517	4,889
International Mailing
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	78,509	98,430
International Mailing | ASC 606
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	49,746	61,461
International Mailing | Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	27,930	32,836
International Mailing | Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	21,816	28,625
International Mailing | Sales And Services
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	49,746	61,461
International Mailing | Equipment sales
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	12,079	11,795
Revenue from leasing transactions and financing	10,599	16,025
International Mailing | Supplies
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	15,850	21,042
International Mailing | Software
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
International Mailing | Rentals
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Revenue from leasing transactions and financing	4,878	5,453
International Mailing | Financing
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	0	0
Revenue from leasing transactions and financing	13,286	15,491
International Mailing | Support services
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	20,890	26,937
International Mailing | Business services
Disaggregation of Revenue [Line Items]
Total Revenue recognized under ASC 606	$ 927	$ 1,687