Business segment information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) segment	Jun. 30, 2022 USD ($) segment
Business segment information [Line Items]
Number of reportable business segments | segment			4	4
Revenue	$ 571,686	$ 562,953	$ 1,117,051	$ 1,118,968
Depreciation and amortization	(42,607)	(45,047)	(86,128)	(86,644)
Interest expense	(31,932)	(21,349)	(61,948)	(41,672)
Net income attributable to non-controlling interest	26	35	54	71
Restructuring and integration costs	(27,477)	(15,208)	(41,571)	(31,511)
Share-based compensation expense	(5,484)	(4,896)	(11,350)	(13,038)
Acquisition transaction costs	0	(12)	0	(61)
Certain legal-related benefit (expense)	183	(162)	(245)	(845)
Gain on sale of businesses and facility	21,942	17,527	21,942	17,527
Income before income taxes	23,023	32,625	29,562	45,183
Reportable business segments [Member]
Business segment information [Line Items]
Revenue	571,686	562,953	1,117,051	1,118,968
Adjusted EBITDA	158,883	149,655	306,044	303,157
Reportable business segments [Member] | Payments [Member]
Business segment information [Line Items]
Revenue	174,372	171,154	346,355	337,362
Adjusted EBITDA	36,318	34,986	72,873	71,421
Reportable business segments [Member] | Data Solutions [Member]
Business segment information [Line Items]
Revenue	72,090	68,587	130,683	138,084
Adjusted EBITDA	17,741	17,509	33,058	34,836
Reportable business segments [Member] | Promotional Solutions [Member]
Business segment information [Line Items]
Revenue	138,800	139,276	274,942	272,519
Adjusted EBITDA	21,239	14,596	40,049	31,540
Reportable business segments [Member] | Checks [Member]
Business segment information [Line Items]
Revenue	186,424	183,936	365,071	371,003
Adjusted EBITDA	83,585	82,564	160,064	165,360
Corporate [Member]
Business segment information [Line Items]
Adjusted EBITDA	$ (50,511)	$ (47,918)	$ (97,236)	$ (101,801)