Represents the maximum percentage of voting stock of foreign subsidiaries that can be pledged.

No definition available.

Name:	stri_DebtInstrumentCollateralLimitOnPledgingOfVotingStockOfForeignSubsidiariesPercentage
Namespace Prefix:	stri_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage increase in the interest rate on the debt instrument in the event any amount is not paid when due or an event of default exists under the terms of the credit agreement.

+ References

No definition available.

+ Details

Name:	stri_DebtInstrumentContingentIncreaseInInterestRatePercentage
Namespace Prefix:	stri_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the increase in the available borrowing capacity of the debt instrument, upon the satisfaction of certain conditions.

+ References

No definition available.

+ Details

Name:	stri_LineOfCreditFacilityBorrowingCapacityAvailableIncrease
Namespace Prefix:	stri_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_DebtInstrumentLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Decrease for amounts repaid on the credit facility for the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(f))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph f

-Article 4

+ Details

Name:	us-gaap_LineOfCreditFacilityDecreaseRepayments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.8)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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Balance Type:	debit
Period Type:	duration

LONG-TERM DEBT (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended		0 Months Ended					0 Months Ended	9 Months Ended						9 Months Ended			9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 02, 2011 2007 Credit Agreements	Jun. 15, 2007 2007 Credit Agreements Term loan under first lien credit facility	Jun. 15, 2007 2007 Credit Agreements Revolving credit facility	Jun. 15, 2007 2007 Credit Agreements Term loan under second lien credit facility	Jun. 15, 2007 2007 Credit Agreements Letters of credit	Sep. 16, 2013 2011 Credit Agreement	Sep. 15, 2013 2011 Credit Agreement	Sep. 30, 2013 2011 Credit Agreement Minimum	Sep. 30, 2013 2011 Credit Agreement Maximum	Sep. 15, 2013 2011 Credit Agreement Eurocurrency rate	Sep. 15, 2013 2011 Credit Agreement Eurocurrency rate Minimum	Sep. 15, 2013 2011 Credit Agreement Eurocurrency rate Maximum	Sep. 15, 2013 2011 Credit Agreement Base rate	Sep. 15, 2013 2011 Credit Agreement Base rate Minimum	Sep. 15, 2013 2011 Credit Agreement Base rate Maximum	Sep. 15, 2013 2011 Credit Agreement Federal funds rate	Sep. 15, 2013 2011 Credit Agreement Bank of America's prime rate	Sep. 15, 2013 2011 Credit Agreement Eurocurrency rate for Eurocurrency loans of one month	Oct. 07, 2011 2011 Credit Agreement Revolving credit facility	Oct. 07, 2011 2011 Credit Agreement Letters of credit	Oct. 07, 2011 2011 Credit Agreement Multicurrency borrowings	Oct. 07, 2011 2011 Credit Agreement Swing line loans	Sep. 28, 2012 2012 Amendment to the Credit Agreement Revolving credit facility
Long-term debt
Maximum borrowing capacity				$ 185,000	$ 20,000	$ 75,000	$ 15,000														$ 150,000	$ 25,000	$ 50,000	$ 5,000	$ 25,000
Repayment of debt			237,732
Write-off of remaining unamortized deferred financing costs	143	844	3,586					143
Aggregate additional increase in credit facility																					50,000
Limit on pledging of voting stock of foreign subsidiaries (as a percent)									66.00%
Variable rate basis												Eurocurrency rate			Base rate			Federal funds rate	Prime rate	Eurocurrency rate of one month Eurocurrency loans
Applicable margin (as a percent)													2.00%	2.50%		1.00%	1.50%	0.50%		1.00%
Increase in applicable interest rate (as a percent)									2.00%
Commitment fee (as a percent)										0.25%	0.35%
Outstanding indebtedness									$ 0