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Supplemental balance sheet and cash flow information (goodwill) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021
Goodwill [Roll Forward]
Goodwill, gross, beginning of year		$ 1,288,825
Accumulated impairment charges, beginning of year		(585,867)
Goodwill, net of accumulated impairment charges, beginning of year		702,958
Goodwill resulting from acquisition (Note 6)	$ 736,308	736,308
Currency translation adjustment		37
Goodwill, gross, end of period	2,025,170	2,025,170
Accumulated impairment charges, end of period	(585,867)	(585,867)
Goodwill, net of accumulated impairment charges, end of period	1,439,303	1,439,303
Reportable business segments [Member] | Payments [Member]
Goodwill [Roll Forward]
Goodwill, gross, beginning of year		168,165
Accumulated impairment charges, beginning of year		0
Goodwill, net of accumulated impairment charges, beginning of year		168,165
Goodwill resulting from acquisition (Note 6)		736,308
Goodwill, gross, end of period	904,473	904,473
Accumulated impairment charges, end of period	0	0
Goodwill, net of accumulated impairment charges, end of period	904,473	904,473
Reportable business segments [Member] | Cloud Solutions [Member]
Goodwill [Roll Forward]
Goodwill, gross, beginning of year		432,984
Accumulated impairment charges, beginning of year		(392,168)
Goodwill, net of accumulated impairment charges, beginning of year		40,816
Goodwill, gross, end of period	432,984	432,984
Accumulated impairment charges, end of period	(392,168)	(392,168)
Goodwill, net of accumulated impairment charges, end of period	40,816	40,816
Reportable business segments [Member] | Promotional Solutions [Member]
Goodwill [Roll Forward]
Goodwill, gross, beginning of year		252,864
Accumulated impairment charges, beginning of year		(193,699)
Goodwill, net of accumulated impairment charges, beginning of year		59,165
Currency translation adjustment		37
Goodwill, gross, end of period	252,901	252,901
Accumulated impairment charges, end of period	(193,699)	(193,699)
Goodwill, net of accumulated impairment charges, end of period	59,202	59,202
Reportable business segments [Member] | Checks [Member]
Goodwill [Roll Forward]
Goodwill, gross, beginning of year		434,812
Accumulated impairment charges, beginning of year		0
Goodwill, net of accumulated impairment charges, beginning of year		434,812
Goodwill, gross, end of period	434,812	434,812
Accumulated impairment charges, end of period	0	0
Goodwill, net of accumulated impairment charges, end of period	$ 434,812	$ 434,812

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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