BUSINESS SEGMENT INFORMATION (disaggregated revenue information) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Product and service information [Line Items]
Total revenue	$ 2,192,260	$ 2,238,010	$ 2,022,197
U. S. [Member]
Product and service information [Line Items]
Total revenue	2,087,652	2,120,985	1,897,388
Foreign, primarily Canada and Australia [Member]
Product and service information [Line Items]
Total revenue	104,608	117,025	124,809
Reportable business segments [Member] \| Payments [Member]
Product and service information [Line Items]
Total revenue	690,704	678,580	510,359
Reportable business segments [Member] \| Payments [Member] \| U. S. [Member]
Product and service information [Line Items]
Total revenue	640,769	634,945	469,102
Reportable business segments [Member] \| Payments [Member] \| Foreign, primarily Canada and Australia [Member]
Product and service information [Line Items]
Total revenue	49,935	43,635	41,257
Reportable business segments [Member] \| Data Solutions [Member]
Product and service information [Line Items]
Total revenue	238,817	267,525	262,310
Reportable business segments [Member] \| Data Solutions [Member] \| U. S. [Member]
Product and service information [Line Items]
Total revenue	233,090	248,227	227,091
Reportable business segments [Member] \| Data Solutions [Member] \| Foreign, primarily Canada and Australia [Member]
Product and service information [Line Items]
Total revenue	5,727	19,298	35,219
Reportable business segments [Member] \| Promotional Solutions [Member]
Product and service information [Line Items]
Total revenue	541,650	562,917	546,473
Reportable business segments [Member] \| Promotional Solutions [Member] \| U. S. [Member]
Product and service information [Line Items]
Total revenue	518,929	537,643	522,966
Reportable business segments [Member] \| Promotional Solutions [Member] \| Foreign, primarily Canada and Australia [Member]
Product and service information [Line Items]
Total revenue	22,721	25,274	23,507
Reportable business segments [Member] \| Checks [Member]
Product and service information [Line Items]
Total revenue	721,089	728,988	703,055
Reportable business segments [Member] \| Checks [Member] \| U. S. [Member]
Product and service information [Line Items]
Total revenue	694,864	700,170	678,229
Reportable business segments [Member] \| Checks [Member] \| Foreign, primarily Canada and Australia [Member]
Product and service information [Line Items]
Total revenue	26,225	28,818	24,826
Checks [Member]
Product and service information [Line Items]
Total revenue	721,089	728,988	703,055
Checks [Member] \| Reportable business segments [Member] \| Checks [Member]
Product and service information [Line Items]
Total revenue	721,089	728,988	703,055
Merchant services and other payment solutions [Member]
Product and service information [Line Items]
Total revenue	450,384	437,395	276,118
Merchant services and other payment solutions [Member] \| Reportable business segments [Member] \| Payments [Member]
Product and service information [Line Items]
Total revenue	450,384	437,395	276,118
Marketing and promotional solutions [Member]
Product and service information [Line Items]
Total revenue	278,200	272,997	249,480
Marketing and promotional solutions [Member] \| Reportable business segments [Member] \| Promotional Solutions [Member]
Product and service information [Line Items]
Total revenue	278,200	272,997	249,480
Forms and other products [Member]
Product and service information [Line Items]
Total revenue	263,450	289,920	296,993
Forms and other products [Member] \| Reportable business segments [Member] \| Promotional Solutions [Member]
Product and service information [Line Items]
Total revenue	263,450	289,920	296,993
Treasury management solutions [Member]
Product and service information [Line Items]
Total revenue	240,320	241,185	234,241
Treasury management solutions [Member] \| Reportable business segments [Member] \| Payments [Member]
Product and service information [Line Items]
Total revenue	240,320	241,185	234,241
Data-driven marketing solutions [Member]
Product and service information [Line Items]
Total revenue	192,656	177,598	150,772
Data-driven marketing solutions [Member] \| Reportable business segments [Member] \| Data Solutions [Member]
Product and service information [Line Items]
Total revenue	192,656	177,598	150,772
Web and hosted solutions [Member]
Product and service information [Line Items]
Total revenue	46,161	89,927	111,538
Web and hosted solutions [Member] \| Reportable business segments [Member] \| Data Solutions [Member]
Product and service information [Line Items]
Total revenue	$ 46,161	$ 89,927	$ 111,538