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Supplemental balance sheet and cash flow information (goodwill) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2022	Sep. 30, 2022
Goodwill [Roll Forward]
Goodwill, gross, beginning of year		$ 2,016,008
Accumulated impairment charges, beginning of year		(585,867)
Goodwill, net of accumulated impairment charges, beginning of year		1,430,141
Measurement-period adjustment (Note 6)	$ 1,343
Currency translation adjustment		(126)
Goodwill, gross, end of period		2,017,225
Accumulated impairment charges, end of period		(585,867)
Goodwill, net of accumulated impairment charges, end of period		1,431,358
Reportable business segments [Member] | Payments [Member]
Goodwill [Roll Forward]
Goodwill, gross, beginning of year		895,338
Accumulated impairment charges, beginning of year		0
Goodwill, net of accumulated impairment charges, beginning of year		895,338
Measurement-period adjustment (Note 6)	$ 1,343
Goodwill, gross, end of period		896,681
Accumulated impairment charges, end of period		0
Goodwill, net of accumulated impairment charges, end of period		896,681
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
Accumulated impairment charges, end of period		(392,168)
Goodwill, net of accumulated impairment charges, end of period		40,816
Reportable business segments [Member] | Promotional Solutions [Member]
Goodwill [Roll Forward]
Goodwill, gross, beginning of year		252,874
Accumulated impairment charges, beginning of year		(193,699)
Goodwill, net of accumulated impairment charges, beginning of year		59,175
Currency translation adjustment		(126)
Goodwill, gross, end of period		252,748
Accumulated impairment charges, end of period		(193,699)
Goodwill, net of accumulated impairment charges, end of period		59,049
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
Accumulated impairment charges, end of period		0
Goodwill, net of accumulated impairment charges, end of period		$ 434,812

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