ACQUISITIONS (Details) $ in Thousands			3 Months Ended				6 Months Ended	12 Months Ended
		Jun. 01, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) business
Acquisitions [Line Items]
Acquisition transaction costs								$ 18,913	$ 8	$ 215
Payments for acquisition, net of cash, cash equivalents, restricted cash and restricted cash equivalents acquired								958,514	0	8,251
Goodwill								727,173
Intangible assets								384,655	84,814	61,762
Revenue			$ 454,492	$ 439,461	$ 410,405	$ 486,423		2,022,197	1,790,781	2,008,715
Net income (loss) attributable to Deluxe			$ 24,663	$ 29,417	$ 14,859	$ (63,695)		62,633	5,244	(223,779)
Pro forma revenue								2,182,648	2,082,130
Pro forma net income (loss) attributable to Deluxe								64,705	(45,407)
Customer lists/relationships [Member]
Acquisitions [Line Items]
Intangible assets	[1]							149,642	45,470	17,771
Partner relationships [Member]
Acquisitions [Line Items]
Intangible assets								73,095	0	0
Technology-based intangibles [Member]
Acquisitions [Line Items]
Intangible assets								65,000	0	0
Trade names [Member]
Acquisitions [Line Items]
Intangible assets								21,000	0	0
Internal-use software [Member]
Acquisitions [Line Items]
Intangible assets								75,918	$ 39,344	$ 43,991
First American [Member]
Acquisitions [Line Items]
Payments for acquisition, net of cash, cash equivalents, restricted cash and restricted cash equivalents acquired								958,514
Goodwill		$ 727,173						727,173
Intangibles, purchase accounting adjustments							$ 15,694
Goodwill, purchase accounting adjustment							(9,135)
Trade accounts receivable		27,296
Other current assets		8,533
Property, plant and equipment		9,873
Operating lease assets		24,396
Intangible assets		291,111
Other non-current assets		350
Accounts payable		(18,475)
Funds held for customers		(9,428)
Accrued liabilities		(23,460)
Operating lease liabilities, non-current		(21,316)
Deferred income taxes		(53,163)
Other non-current liabilities		(4,376)
Cash, cash equivalents, restricted cash and restricted cash equivalents acquired		15,841
Revenue								194,976
Net income (loss) attributable to Deluxe								$ 1,806
First American [Member] | Deferred revenue [Member]
Acquisitions [Line Items]
Deferred revenue, purchase accounting adjustment							$ 3,027
First American [Member] | Customer lists/relationships [Member]
Acquisitions [Line Items]
Intangible assets		127,000
First American [Member] | Partner relationships [Member]
Acquisitions [Line Items]
Intangible assets		72,000
First American [Member] | Technology-based intangibles [Member]
Acquisitions [Line Items]
Intangible assets		65,000
First American [Member] | Trade names [Member]
Acquisitions [Line Items]
Intangible assets		21,000
First American [Member] | Internal-use software [Member]
Acquisitions [Line Items]
Intangible assets		$ 6,111
2019 acquisitions [Member]
Acquisitions [Line Items]
Number of businesses acquired | business										2
Total aggregate purchase price										$ 10,000
2019 acquisitions [Member] | Customer lists/relationships [Member]
Acquisitions [Line Items]
Intangible assets										5,815
Remittance processing business of Fiserv, Inc. [Member]
Acquisitions [Line Items]
Goodwill										4,174
2018 acquisitions [Member]
Acquisitions [Line Items]
Goodwill, purchase accounting adjustment										(1,749)
Adjustment to purchase price for previous acquisition										$ (1,749)

[1] We acquired customer lists that did not qualify as business combinations of $22,642 during 2021, $45,470 during 2020 and $11,956 during 2019.