The amount of the supplemental award to the plaintiffs for attorney's fees, cost and expenses determined by the U.S. District Court for the Eastern District of Texas.

Name:	lufk_FinalDistrictCourtJudgmentAttorneysFeesCostsAndExpensesAwardedToPlaintiffs
Namespace Prefix:	lufk
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of damages awarded to the plaintiffs in the final judgment of the U.S. District Court for the Eastern District of Texas.

+ Details

Name:	lufk_FinalDistrictCourtJudgmentDamagesAwardedToPlaintiffs
Namespace Prefix:	lufk
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The interest rate determined by the U.S. District Court for the Eastern District of Texas to be applied to awards of back pay accrued subsequent to the judgment date.

+ Details

Name:	lufk_FinalDistrictCourtJudgmentPostJudgmentInterestRateInHundredths
Namespace Prefix:	lufk
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of pre-judgment interest awarded to the plaintiffs in the final judgment of the U.S. District Court for the Eastern District of Texas.

+ Details

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Namespace Prefix:	lufk
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of the interim award to the plaintiffs for attorney's fees and costs determined by the U.S. District Court for the Eastern District of Texas.

+ Details

Name:	lufk_InterimDistrictCourtJudgmentAttorneyFeesAndCostsAwardedToPlaintiffs
Namespace Prefix:	lufk
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of days in which the plaintiffs were required to submit a supplemental request for legal fees and expenses for the period from January 1, 2009 through the date of the final judgment.

+ Details

Name:	lufk_NumberOfDaysPlaintiffsWereGivenToSubmitSupplementalRequest
Namespace Prefix:	lufk
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of back pay originally awarded to the plaintiffs by the U.S. District Court for the Eastern District of Texas. This award was subsequently vacated and remanded for re-computation by the U.S. Court of Appeals for the Fifth Circuit.

+ Details

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

- Definition

The maximum estimated amount of attorney's fees originally determined to be awarded to the plaintiffs by the U.S. District Court for the Eastern District of Texas, calculated based on a formula provided by the District Court.

+ Details

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Namespace Prefix:	lufk
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The interest rate originally determined by the U.S. District Court for the Eastern District of Texas to be applied to awards of back pay accrued prior to the judgment date.

+ Details

Name:	lufk_OriginalDistrictCourtJudgmentPreJudgmentInterestRate
Namespace Prefix:	lufk
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This element represents the gross amount awarded, to be received by, or to be remitted to the entity in settlement of litigation occurring during the period.

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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.

+ Details

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

- Definition

The increase (decrease) in the period in loss contingency liabilities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12
-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 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349

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Period Type:	duration

- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12
-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 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14435-108349

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14557-108349

+ Details

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Balance Type:	debit
Period Type:	instant

Legal Proceedings (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended	9 Months Ended					3 Months Ended
	Dec. 31, 2009 Class Action Complaint [Member]	Dec. 31, 2008 Class Action Complaint [Member]	Jun. 30, 2009 Class Action Complaint [Member]	Sep. 30, 2010 Class Action Complaint [Member]	Aug. 29, 2011 Class Action Complaint [Member]	Sep. 28, 2010 Class Action Complaint [Member]	Jan. 29, 2010 Class Action Complaint [Member]	Jan. 15, 2010 Class Action Complaint [Member]	Jun. 30, 2011 Industrial Accident [Member]
Loss Contingencies [Line Items]
Original District Court judgment, pre-judgment interest rate (in hundredths)					5.00%
Original District Court judgment, back pay awarded to plaintiffs					$ 3.4
Original District Court judgment, estimated attorney fees to be awarded to plaintiffs, maximum					2.5
Interim District Court judgment, attorney fees and costs awarded to plaintiffs			5.8
Loss provision recorded during the period	1.0	6.0	5.0	1.0
Final District Court judgment, damages awarded to plaintiffs								3.3
Final District Court judgment, pre-judgment interest awarded to plaintiffs								2.2
Final District Court judgment, post-judgment interest rate (in hundredths)								0.41%
Previous estimate of total liability for damages and interest								5.2
Number of days plaintiffs were given to submit supplemental request								14 days
Final District Court judgment, attorney's fees, costs and expenses awarded to plaintiffs						0.7	0.7
Amount reserved for deductible amount									$ 1.0