Revenue (Disaggregates of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	$ 860,779	$ 865,240	$ 1,729,181	$ 1,761,823
Total consolidated revenue	860,779	865,240	1,729,181	1,761,823
ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	683,748	676,690	1,364,456	1,363,462
Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	86,344	117,321	179,562	224,526
Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	597,404	559,369	1,184,894	1,138,936
Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	683,748	676,690	1,364,456	1,363,462
Revenue from leasing transactions and financing	177,031	188,550	364,725	398,361
Total consolidated revenue	860,779	865,240	1,729,181	1,761,823
Equipment sales
Disaggregation of Revenue [Line Items]
Revenue from products and services	19,384	21,844	40,677	44,055
Revenue from leasing transactions and financing	66,167	71,967	134,661	156,464
Total consolidated revenue	85,551	93,811	175,338	200,519
Supplies
Disaggregation of Revenue [Line Items]
Revenue from products and services	46,490	55,457	97,443	115,450
Revenue from leasing transactions and financing	0	0	0	0
Total consolidated revenue	46,490	55,457	97,443	115,450
Software
Disaggregation of Revenue [Line Items]
Revenue from products and services	72,206	91,703	145,524	167,997
Revenue from leasing transactions and financing	0	0	0	0
Total consolidated revenue	72,206	91,703	145,524	167,997
Rentals
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	18,445	19,454	40,602	44,419
Total consolidated revenue	18,445	19,454	40,602	44,419
Financing
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	92,419	97,129	189,462	197,478
Total consolidated revenue	92,419	97,129	189,462	197,478
Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services	127,683	138,598	256,304	279,248
Revenue from leasing transactions and financing	0	0	0	0
Total consolidated revenue	127,683	138,598	256,304	279,248
Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	417,985	369,088	824,508	756,712
Revenue from leasing transactions and financing	0	0	0	0
Total consolidated revenue	417,985	369,088	824,508	756,712
Software Solutions
Disaggregation of Revenue [Line Items]
Revenue from products and services	72,206	91,703	145,524	167,997
Revenue from leasing transactions and financing	72,206	91,703	145,524	167,997
Software Solutions | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	72,206	91,703	145,524	167,997
Software Solutions | Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	20,470	40,020	41,442	65,021
Software Solutions | Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	51,736	51,683	104,082	102,976
Software Solutions | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	72,206	91,703	145,524	167,997
Software Solutions | 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
Software Solutions | Supplies
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Software Solutions | Software
Disaggregation of Revenue [Line Items]
Revenue from products and services	72,206	91,703	145,524	167,997
Software Solutions | 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
Software Solutions | 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
Software Solutions | Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Software Solutions | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Global Ecommerce
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	282,319	239,100	548,573	485,690
Global Ecommerce | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	282,319	239,100	548,573	485,690
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	282,319	239,100	548,573	485,690
Global Ecommerce | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	282,319	239,100	548,573	485,690
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 | Software
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	282,319	239,100	548,573	485,690
Presort Services
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	128,138	122,730	262,985	257,188
Presort Services | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	128,138	122,730	262,985	257,188
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	128,138	122,730	262,985	257,188
Presort Services | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	128,138	122,730	262,985	257,188
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 | Software
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	(22)	0	0	0
Presort Services | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	128,160	122,730	262,985	257,188
North America Mailing
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	303,417	318,901	618,891	659,712
North America Mailing | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	155,711	166,478	312,257	334,447
North America Mailing | Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	40,343	46,837	84,660	96,204
North America Mailing | Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	115,368	119,641	227,597	238,243
North America Mailing | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	155,711	166,478	312,257	334,447
North America Mailing | Equipment sales
Disaggregation of Revenue [Line Items]
Revenue from products and services	7,882	10,566	17,097	20,981
Revenue from leasing transactions and financing	54,191	55,957	112,086	124,429
North America Mailing | Supplies
Disaggregation of Revenue [Line Items]
Revenue from products and services	32,461	36,271	67,563	75,223
North America Mailing | Software
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
North America Mailing | Rentals
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	13,540	14,339	30,819	33,851
North America Mailing | Financing
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	79,975	82,127	163,729	166,985
North America Mailing | Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services	108,851	113,977	216,562	227,690
North America Mailing | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	6,517	5,664	11,035	10,553
International Mailing
Disaggregation of Revenue [Line Items]
Revenue from leasing transactions and financing	74,699	92,806	153,208	191,236
International Mailing | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	45,374	56,679	95,117	118,140
International Mailing | Products/services transferred at a point in time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	25,531	30,464	53,460	63,301
International Mailing | Products/services transferred over time | ASC 606
Disaggregation of Revenue [Line Items]
Revenue from products and services	19,843	26,215	41,657	54,839
International Mailing | Sales And Services
Disaggregation of Revenue [Line Items]
Revenue from products and services	45,374	56,679	95,117	118,140
International Mailing | Equipment sales
Disaggregation of Revenue [Line Items]
Revenue from products and services	11,502	11,278	23,580	23,074
Revenue from leasing transactions and financing	11,976	16,010	22,575	32,035
International Mailing | Supplies
Disaggregation of Revenue [Line Items]
Revenue from products and services	14,029	19,186	29,880	40,227
International Mailing | Software
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
International Mailing | Rentals
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	4,905	5,115	9,783	10,568
International Mailing | Financing
Disaggregation of Revenue [Line Items]
Revenue from products and services	0	0	0	0
Revenue from leasing transactions and financing	12,444	15,002	25,733	30,493
International Mailing | Support services
Disaggregation of Revenue [Line Items]
Revenue from products and services	18,854	24,621	39,742	51,558
International Mailing | Business services
Disaggregation of Revenue [Line Items]
Revenue from products and services	$ 989	$ 1,594	$ 1,915	$ 3,281