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Revenue Recognition (Details) - Software license and related revenues and consulting services [Member] $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($)
2019 | $ 5,281
2020 | 5,183
2021 and thereafter | $ 969

X
- Definition Future estimated revenue expected to be recognized within one year. + References No definition available. + Details
Name: | mgic_EstimatedRevenueExpectedToRecognizedInFuturePeriodsInCurrent
Namespace Prefix: | mgic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Future estimated revenue expected to be recognized within the second year. + References No definition available. + Details
Name: | mgic_EstimatedRevenueExpectedToRecognizedInFuturePeriodsInTwoYears
Namespace Prefix: | mgic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Future estimated revenue expected to be recognized. + References No definition available. + Details
Name: | mgic_EstimatedRevenueExpectedToRecognizedInFuturePeriodsThereafter
Namespace Prefix: | mgic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_ProductOrServiceAxis=mgic_SoftwareLicenseAndRelatedRevenuesAndConsultingServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |