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Fair Value Measurements (Details 1) - Level 3 [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Summary of fair value measurements by using significant unobservable inputs
Opening balance	$ 414	$ 1,333
Increase in contingent consideration due to acquisitions	5,851	124
Payment of contingent consideration	(585)	(974)
Increase in fair value of contingent consideration	255	210
Decrease in fair value of contingent consideration		(248)
Amortization of interest and exchange rate	29	(31)
Closing balance	$ 5,964	$ 414

X

- Definition

This element represents increase in contingent consideration due to acquisitions measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances.

+ References

No definition available.

+ Details

Name:	mgic_FairValueMeasurementWithUnobservableInputsIncreaseInContingentConsiderationDueToAcquisitions
Namespace Prefix:	mgic_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

This element represents increase in fair value of contingent consideration measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances.

+ References

No definition available.

+ Details

Name:	mgic_FairValueMeasurementWithUnobservableInputsIncreaseInFairValueOfContingentConsideration
Namespace Prefix:	mgic_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

This element represents decrease in fair value of contingent consideration measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances.

+ References

No definition available.

+ Details

Name:	mgic_FairValueMeasurementWithUnobservableInputsReconciliationDecreaseInFairValueOfContingentConsideration
Namespace Prefix:	mgic_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

No definition available.

+ Details

Name:	mgic_FairValueMeasurementWithUnobservableInputsReconciliationPaymentOfContingentConsideration
Namespace Prefix:	mgic_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

This element represents amortization of interest and exchange rate measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances.

+ References

No definition available.

+ Details

Name:	mgic_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAmortizationOfInterestAndExchangeRate
Namespace Prefix:	mgic_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_FairValueNetAssetLiabilityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: