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SIGNIFICANT ACCOUNTING POLICIES (business combinations and prepaid product discounts) (Details) | 12 Months Ended
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Dec. 31, 2023
Business ccmbinations |
Measurement period | 1 year
Maximum [Member] |
Prepaid product discounts [Line Items] |
Amortization period | 14 years 6 months
Weighted-average [Member] |
Prepaid product discounts [Line Items] |
Amortization period | 6 years

X
- Definition The period over which prepaid product discounts are amortized and reflected as reductions of revenue in the consolidated statements of income. + References No definition available. + Details
Name: | dlx_Amortizationperiodprepaidproductdiscounts
Namespace Prefix: | dlx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition In accounting for business combinations, the period over which adjustments may be recorded to the purchase price allocation. Also known as the measurement period. + References No definition available. + Details
Name: | dlx_Businesscombinationsmeasurementperiod
Namespace Prefix: | dlx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition [Line Items] for Prepaid product discounts [Table] + References No definition available. + Details
Name: | dlx_PrepaidproductdiscountsLineItems
Namespace Prefix: | dlx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_BusinessCombinationsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_WeightedAverageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |