Debt Covenant Description Fixed Charge Coverage Ratio

No definition available.

Name:	seh_DebtCovenantDescriptionFixedChargeCoverageRatio
Namespace Prefix:	seh_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument Covenant Description Annual Capital Expenditures When Leverage Ratio Exceeds 2 Point 5

+ References

No definition available.

+ Details

Name:	seh_DebtInstrumentCovenantDescriptionAnnualCapitalExpendituresWhenLeverageRatioExceeds2Point5
Namespace Prefix:	seh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Debt Instrument Covenant Description Leverage Ratio

+ References

No definition available.

+ Details

Name:	seh_DebtInstrumentCovenantDescriptionLeverageRatio
Namespace Prefix:	seh_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument Covenant Description Percentage Of Scheduled Installment Payments

+ References

No definition available.

+ Details

Name:	seh_DebtInstrumentCovenantDescriptionPercentageOfScheduledInstallmentPayments
Namespace Prefix:	seh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument Covenant Description Sale Of Business Proceeds Threshold For Additional Payments

+ References

No definition available.

+ Details

Name:	seh_DebtInstrumentCovenantDescriptionSaleOfBusinessProceedsThresholdForAdditionalPayments
Namespace Prefix:	seh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Debt Instrument Excess Cash Flow Payments Principal

+ References

No definition available.

+ Details

Name:	seh_DebtInstrumentExcessCashFlowPaymentsPrincipal
Namespace Prefix:	seh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Debt Instrument Fee In Event Of Credit Profile Rating Decrease To Defined Level

+ References

No definition available.

+ Details

Name:	seh_DebtInstrumentFeeInEventOfCreditProfileRatingDecreaseToDefinedLevel
Namespace Prefix:	seh_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument Maturity Date Term

+ References

No definition available.

+ Details

Name:	seh_DebtInstrumentMaturityDateTerm
Namespace Prefix:	seh_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Long Term Debt Average Outstanding Amount

+ References

No definition available.

+ Details

Name:	seh_LongTermDebtAverageOutstandingAmount
Namespace Prefix:	seh_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Long Term Debt Prepayment Of Full Principal Make Whole Amount

+ References

No definition available.

+ Details

Name:	seh_LongTermDebtPrepaymentOfFullPrincipalMakeWholeAmount
Namespace Prefix:	seh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of the total principal payments made during the annual reporting period.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

+ Details

Name:	us-gaap_DebtInstrumentAnnualPrincipalPayment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

+ References

Reference 1: 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=6451184&loc=d3e28551-108399

Reference 2: 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=6584090&loc=d3e28878-108400

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

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 21

-Paragraph 16, 20

-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.

+ Details

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

- Definition

Amount of the fee that accompanies borrowing money under the debt instrument.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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 210.5-02.22(b))

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

+ Details

Name:	us-gaap_DebtInstrumentFeeAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Increase in basis points of the stated interest rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentInterestRateIncrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Interest rate stated in the contractual debt agreement.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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 210.5-02.22(a)(1))

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

+ Details

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

- Details

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

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: 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 2: 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_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

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

- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 7

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20, 22

-Article 5

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

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

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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

- Definition

Reflects the calculation as of the balance sheet date of the average interest rate weighted by the amount of long-term debt outstanding by type or by instrument at that time.

+ References

No definition available.

+ Details

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

- Definition

The cash outflow for loan and debt issuance costs.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 18, 19, 20

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585

+ Details

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

Debt (Narrative) (Details) (USD $) In Millions, unless otherwise specified					3 Months Ended					3 Months Ended		69 Months Ended				3 Months Ended					3 Months Ended
	Feb. 02, 2013	Feb. 02, 2013 2004 Senior Notes	Dec. 06, 2011 2004 Senior Notes	Mar. 13, 2013 2004 Senior Notes Subsequent Event	May 05, 2012 December 2011 Amendments	Feb. 04, 2012 December 2011 Amendments	Dec. 06, 2011 December 2011 Amendments	Dec. 05, 2011 December 2011 Amendments	Feb. 02, 2013 Senior Notes	Feb. 02, 2013 Senior Notes 2004 Senior Notes	May 05, 2012 Senior Notes 2004 Senior Notes	Jun. 08, 2010 Senior Notes 2004 Senior Notes	Dec. 06, 2011 Senior Notes 2004 Senior Notes	Jun. 09, 2010 Senior Notes 2004 Senior Notes	Sep. 14, 2004 Senior Notes 2004 Senior Notes	Feb. 02, 2013 Senior Notes December 2011 Amendments	May 05, 2012 Senior Notes December 2011 Amendments	Jun. 09, 2010 Senior Note Accordion Feature 2004 Senior Notes	Feb. 02, 2013 Credit facility	Feb. 02, 2013 Standby Letters of Credit	Feb. 02, 2013 Revolving Credit Facility [Member]	Feb. 02, 2013 Maximum December 2011 Amendments	Feb. 02, 2013 Maximum Other	Dec. 06, 2011 Minimum December 2011 Amendments	Feb. 02, 2013 Minimum Other	Dec. 06, 2011 Third Quarter 2012 Maximum December 2011 Amendments	Dec. 06, 2011 Fourth Quarter 2012 Minimum December 2011 Amendments	Dec. 06, 2011 Fourth Quarter 2012 Through Third Quarter 2013 Maximum December 2011 Amendments	Dec. 06, 2011 First Quarter 2013 Minimum December 2011 Amendments	Dec. 06, 2011 Second Quarter 2013 Maximum December 2011 Amendments	Dec. 06, 2011 Fourth Quarter 2013 Maximum December 2011 Amendments
Debt Instrument [Line Items]
Debt instrument, face amount															$ 150
Credit facility borrowing capacity														150.0				50.0
Credit facility agreement term (years)										4 years		12 years
Leverage Ratio							2.5																	2.5		3.0		3.0			2.75
Fixed Charge Coverage Ratio																											1.2		1.2	1.3
Percentage of scheduled installment payments (percentage)							50.00%	100.00%
Annual capital expenditures																						30.0
Senior Notes interest rate increase (basis points)											0.05
Interest rate (percentage)			7.08%										7.08%										16.50%		0.17%
Capitalized fees						0.5
Debt instrument fee in event of credit profile rating decrease to defined level (basis points)																0.1
Fee for credit profile rating decrease																	1.1
After tax proceeds from sale of business																								1.0
Excess cash flow payments					2.5
Available capacity									82.2										23.0
Outstanding loans and letters of credit under credit facility																			56.5	11.3
Credit facility wieghted average interest rate (percentage)	3.32%
Revolver average outstanding amount																					61.8
Senior Notes annual required principal payment		22.2
Make whole amount if prepayment of full principal outstanding				$ 10.3