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Business segment information (disaggregated revenue information) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregated revenue information
Revenue		$ 528,444	$ 537,844	$ 1,601,215	$ 1,654,896
Merchant Services [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		93,531	87,984	288,536	268,556
B2B Payments [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		75,140	74,581	214,788	226,118
Data Solutions [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		61,065	64,080	178,169	167,735
Print [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		297,313	304,282	909,393	942,839
All Other [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue	[1]	1,395	6,917	10,329	49,648
Checks [Member]
Disaggregated revenue information
Revenue		176,827	179,990	534,672	545,061
Checks [Member] | Print [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		176,827	179,990	534,672	545,061
Merchant services [Member]
Disaggregated revenue information
Revenue		93,531	87,984	288,536	268,556
Merchant services [Member] | Merchant Services [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		93,531	87,984	288,536	268,556
Promotional solutions [Member]
Disaggregated revenue information
Revenue		61,264	62,309	193,343	204,998
Promotional solutions [Member] | Print [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		61,264	62,309	193,343	203,542
Promotional solutions [Member] | All Other [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue					1,456
Forms and other business products [Member]
Disaggregated revenue information
Revenue		59,222	61,983	181,378	194,236
Forms and other business products [Member] | Print [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		59,222	61,983	181,378	194,236
Treasury management solutions [Member]
Disaggregated revenue information
Revenue		58,574	59,224	169,000	180,864
Treasury management solutions [Member] | B2B Payments [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		58,574	59,224	169,000	180,864
Data-driven marketing [Member]
Disaggregated revenue information
Revenue		56,520	59,561	163,339	153,346
Data-driven marketing [Member] | Data Solutions [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		56,520	59,561	163,339	153,346
Other [Member]
Disaggregated revenue information
Revenue		22,506	26,793	70,947	107,835
Other [Member] | B2B Payments [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		16,566	15,357	45,788	45,254
Other [Member] | Data Solutions [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		4,545	4,519	14,830	14,389
Other [Member] | All Other [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		$ 1,395	$ 6,917	$ 10,329	$ 48,192
[1] Includes our North American web hosting and logo design businesses, which were sold in June 2023, and our payroll and human resources services business, which we are in the process of exiting (Note 6).

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