Business segment information (disaggregated revenue information) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Disaggregated revenue information
Revenue	$ 545,365	$ 556,015
United States [Member]
Disaggregated revenue information
Revenue	517,553	523,222
Foreign, primarily Canada [Member]
Disaggregated revenue information
Revenue	27,812	32,793
Reportable business segments [Member]
Disaggregated revenue information
Revenue	545,365	556,015
Reportable business segments [Member] \| Payments [Member]
Disaggregated revenue information
Revenue	171,983	166,208
Reportable business segments [Member] \| Payments [Member] \| United States [Member]
Disaggregated revenue information
Revenue	159,464	156,268
Reportable business segments [Member] \| Payments [Member] \| Foreign, primarily Canada [Member]
Disaggregated revenue information
Revenue	12,519	9,940
Reportable business segments [Member] \| Data Solutions [Member]
Disaggregated revenue information
Revenue	58,594	69,497
Reportable business segments [Member] \| Data Solutions [Member] \| United States [Member]
Disaggregated revenue information
Revenue	55,747	60,624
Reportable business segments [Member] \| Data Solutions [Member] \| Foreign, primarily Canada [Member]
Disaggregated revenue information
Revenue	2,847	8,873
Reportable business segments [Member] \| Promotional Solutions [Member]
Disaggregated revenue information
Revenue	136,141	133,243
Reportable business segments [Member] \| Promotional Solutions [Member] \| United States [Member]
Disaggregated revenue information
Revenue	130,495	127,242
Reportable business segments [Member] \| Promotional Solutions [Member] \| Foreign, primarily Canada [Member]
Disaggregated revenue information
Revenue	5,646	6,001
Reportable business segments [Member] \| Checks [Member]
Disaggregated revenue information
Revenue	178,647	187,067
Reportable business segments [Member] \| Checks [Member] \| United States [Member]
Disaggregated revenue information
Revenue	171,847	179,088
Reportable business segments [Member] \| Checks [Member] \| Foreign, primarily Canada [Member]
Disaggregated revenue information
Revenue	6,800	7,979
Checks [Member]
Disaggregated revenue information
Revenue	178,647	187,067
Checks [Member] \| Reportable business segments [Member] \| Checks [Member]
Disaggregated revenue information
Revenue	178,647	187,067
Merchant services and other payments solutions [Member]
Disaggregated revenue information
Revenue	111,509	108,270
Merchant services and other payments solutions [Member] \| Reportable business segments [Member] \| Payments [Member]
Disaggregated revenue information
Revenue	111,509	108,270
Forms and other products [Member]
Disaggregated revenue information
Revenue	65,490	70,316
Forms and other products [Member] \| Reportable business segments [Member] \| Promotional Solutions [Member]
Disaggregated revenue information
Revenue	65,490	70,316
Marketing and promotional solutions [Member]
Disaggregated revenue information
Revenue	70,651	62,927
Marketing and promotional solutions [Member] \| Reportable business segments [Member] \| Promotional Solutions [Member]
Disaggregated revenue information
Revenue	70,651	62,927
Treasury management solutions [Member]
Disaggregated revenue information
Revenue	60,474	57,938
Treasury management solutions [Member] \| Reportable business segments [Member] \| Payments [Member]
Disaggregated revenue information
Revenue	60,474	57,938
Data-driven marketing solutions [Member]
Disaggregated revenue information
Revenue	39,282	41,843
Data-driven marketing solutions [Member] \| Reportable business segments [Member] \| Data Solutions [Member]
Disaggregated revenue information
Revenue	39,282	41,843
Web and hosted solutions [Member]
Disaggregated revenue information
Revenue	19,312	27,654
Web and hosted solutions [Member] \| Reportable business segments [Member] \| Data Solutions [Member]
Disaggregated revenue information
Revenue	$ 19,312	$ 27,654