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RECENT DEVELOPMENTS (TPSCo new agreements) (Details)	Nov. 28, 2019
TPSCo [Member]
Recent Developments [Line Items]
Percentage of subsidiary owned	49.00%

X

- Definition

Percentage of subsidiary owned.

+ References

No definition available.

+ Details

Name:	tsem_OwnershipPercentage
Namespace Prefix:	tsem_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Recent Developments [LineItems]

+ References

No definition available.

+ Details

Name:	tsem_RecentDevelopmentsLineItems
Namespace Prefix:	tsem_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	dei_LegalEntityAxis=tsem_TpscoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: