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Business segment information (disaggregated revenue information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregated revenue information
Revenue	$ 441,264	$ 486,423
United States [Member]
Disaggregated revenue information
Revenue	410,158	457,536
Foreign, primarily Canada and Australia [Member]
Disaggregated revenue information
Revenue	31,106	28,887
Reportable business segments [Member]
Disaggregated revenue information
Revenue	441,264	486,423
Reportable business segments [Member] | Payments [Member]
Disaggregated revenue information
Revenue	79,438	77,040
Reportable business segments [Member] | Payments [Member] | United States [Member]
Disaggregated revenue information
Revenue	68,484	68,358
Reportable business segments [Member] | Payments [Member] | Foreign, primarily Canada and Australia [Member]
Disaggregated revenue information
Revenue	10,954	8,682
Reportable business segments [Member] | Cloud Solutions [Member]
Disaggregated revenue information
Revenue	62,220	75,945
Reportable business segments [Member] | Cloud Solutions [Member] | United States [Member]
Disaggregated revenue information
Revenue	53,512	68,070
Reportable business segments [Member] | Cloud Solutions [Member] | Foreign, primarily Canada and Australia [Member]
Disaggregated revenue information
Revenue	8,708	7,875
Reportable business segments [Member] | Promotional Solutions [Member]
Disaggregated revenue information
Revenue	124,507	142,794
Reportable business segments [Member] | Promotional Solutions [Member] | United States [Member]
Disaggregated revenue information
Revenue	119,148	136,814
Reportable business segments [Member] | Promotional Solutions [Member] | Foreign, primarily Canada and Australia [Member]
Disaggregated revenue information
Revenue	5,359	5,980
Reportable business segments [Member] | Checks [Member]
Disaggregated revenue information
Revenue	175,099	190,644
Reportable business segments [Member] | Checks [Member] | United States [Member]
Disaggregated revenue information
Revenue	169,014	184,294
Reportable business segments [Member] | Checks [Member] | Foreign, primarily Canada and Australia [Member]
Disaggregated revenue information
Revenue	6,085	6,350
Checks [Member]
Disaggregated revenue information
Revenue	175,099	190,644
Checks [Member] | Reportable business segments [Member] | Checks [Member]
Disaggregated revenue information
Revenue	175,099	190,644
Forms and other products [Member]
Disaggregated revenue information
Revenue	71,781	81,813
Forms and other products [Member] | Reportable business segments [Member] | Promotional Solutions [Member]
Disaggregated revenue information
Revenue	71,781	81,813
Treasury management solutions [Member]
Disaggregated revenue information
Revenue	59,136	56,867
Treasury management solutions [Member] | Reportable business segments [Member] | Payments [Member]
Disaggregated revenue information
Revenue	59,136	56,867
Marketing and promotional solutions [Member]
Disaggregated revenue information
Revenue	52,726	60,981
Marketing and promotional solutions [Member] | Reportable business segments [Member] | Promotional Solutions [Member]
Disaggregated revenue information
Revenue	52,726	60,981
Data-driven marketing solutions [Member]
Disaggregated revenue information
Revenue	33,646	38,997
Data-driven marketing solutions [Member] | Reportable business segments [Member] | Cloud Solutions [Member]
Disaggregated revenue information
Revenue	33,646	38,997
Web and hosted solutions [Member]
Disaggregated revenue information
Revenue	28,574	36,948
Web and hosted solutions [Member] | Reportable business segments [Member] | Cloud Solutions [Member]
Disaggregated revenue information
Revenue	28,574	36,948
Other payments solutions [Member]
Disaggregated revenue information
Revenue	20,302	20,173
Other payments solutions [Member] | Reportable business segments [Member] | Payments [Member]
Disaggregated revenue information
Revenue	$ 20,302	$ 20,173

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