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OTHER LONG-TERM DEBT (Loans to TPSCo from Japanese Institutions) (Narrative) (Details) ¥ in Thousands, $ in Thousands	1 Months Ended		12 Months Ended
	Dec. 31, 2015	Jun. 30, 2014	Dec. 31, 2017 USD ($)	Dec. 31, 2017 JPY (¥)	Dec. 31, 2016 USD ($)
TPSCo [Member] | Term Loan 2014[Member]
Debt Instrument [Line Items]
Outstanding principal			$ 33,000		$ 53,000
TPSCo [Member] | Term Loan 2014[Member] | TIBOR [Member]
Debt Instrument [Line Items]
Basis spread over variable interest rate		1.65%
TPSCo [Member] | Term Loan 2014[Member] | JPY [Member]
Debt Instrument [Line Items]
Outstanding principal | ¥				¥ 8,800,000
TPSCo [Member] | Term Loan 2015 [Member]
Debt Instrument [Line Items]
Maturity term	5 years
Outstanding principal			$ 65,000		73,000
TPSCo [Member] | Term Loan 2015 [Member] | TIBOR [Member]
Debt Instrument [Line Items]
Basis spread over variable interest rate			2.00%
TPSCo [Member] | Term Loan 2015 [Member] | JPY [Member]
Debt Instrument [Line Items]
Outstanding principal | ¥				¥ 8,500,000
JA Mitsui Leasing Capital Corporation [Member] | Loan to TJT [Member]
Debt Instrument [Line Items]
Outstanding principal					$ 40,000
Basis spread over variable interest rate			2.00%

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Details

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