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SIGNIFICANT ACCOUNTING POLICIES (cash and cash equivalents and trade accounts receivable) (Details) | 12 Months Ended
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Dec. 31, 2021
Cash and cash equivalents |
Maximum maturity of cash equivalents | 3 months
Trade accounts receivable |
Period for write-off of trade accounts receivable | 1 year

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- Definition The maximum maturity of investments in debt securities classified as cash equivalents in the entity's statement of financial position. + References No definition available. + Details
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Namespace Prefix: | dlx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

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

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- Definition Threshold period past due for trade accounts receivable to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_ThresholdPeriodPastDueForWriteoffOfTradeAccountsReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration