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Business segment information (disaggregated revenue information) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2025	Mar. 31, 2024
Disaggregated revenue information
Revenue		$ 536,471	$ 534,955
Operating segments [Member]
Disaggregated revenue information
Revenue		536,471	534,955
Merchant Services [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		97,769	96,477
B2B Payments [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		70,155	69,418
Data Solutions [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		77,227	59,712
Print [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		291,304	303,334
All Other [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue	[1]	16	6,014
Checks [Member]
Disaggregated revenue information
Revenue		175,209	178,484
Checks [Member] | Print [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		175,209	178,484
Merchant services [Member]
Disaggregated revenue information
Revenue		97,769	96,477
Merchant services [Member] | Merchant Services [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		97,769	96,477
Data-driven marketing [Member]
Disaggregated revenue information
Revenue		71,994	54,325
Data-driven marketing [Member] | Data Solutions [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		71,994	54,325
Forms and other business products [Member]
Disaggregated revenue information
Revenue		60,530	63,792
Forms and other business products [Member] | Print [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		60,530	63,792
Promotional solutions [Member]
Disaggregated revenue information
Revenue		55,565	61,058
Promotional solutions [Member] | Print [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		55,565	61,058
Treasury management solutions [Member]
Disaggregated revenue information
Revenue		54,312	55,077
Treasury management solutions [Member] | B2B Payments [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		54,312	55,077
Other payment solutions [Member]
Disaggregated revenue information
Revenue		15,843	14,341
Other payment solutions [Member] | B2B Payments [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		15,843	14,341
Other web based solutions [Member]
Disaggregated revenue information
Revenue		5,233	5,387
Other web based solutions [Member] | Data Solutions [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		5,233	5,387
Other [Member]
Disaggregated revenue information
Revenue		16	6,014
Other [Member] | All Other [Member] | Operating segments [Member]
Disaggregated revenue information
Revenue		$ 16	$ 6,014
[1] Includes the payroll and human resources services business, which we substantially exited during 2024 (Note 6)

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