Excess Collateral Availability Percentage

No definition available.

Name:	five_ExcessCollateralAvailabilityPercentage
Namespace Prefix:	five_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Letter Of Credit Fee Percentage

+ References

No definition available.

+ Details

Name:	five_LetterOfCreditFeePercentage
Namespace Prefix:	five_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Letters Of Credit Sublimit Under Credit Facility

+ References

No definition available.

+ Details

Name:	five_LettersOfCreditSublimitUnderCreditFacility
Namespace Prefix:	five_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line Of Credit Facility Collateral Amount

+ References

No definition available.

+ Details

Name:	five_LineOfCreditFacilityCollateralAmount
Namespace Prefix:	five_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line of Credit Borrowed and Repaid During Period

+ References

No definition available.

+ Details

Name:	five_LineofCreditBorrowedandRepaidDuringPeriod
Namespace Prefix:	five_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage Of Average Borrowing Availability Under Credit Facility

+ References

No definition available.

+ Details

Name:	five_PercentageOfAverageBorrowingAvailabilityUnderCreditFacility
Namespace Prefix:	five_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage Of Borrowing Base Of Line Of Credit Facility

+ References

No definition available.

+ Details

Name:	five_PercentageOfBorrowingBaseOfLineOfCreditFacility
Namespace Prefix:	five_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage Of Unused Line Of Credit Facility Fee

+ References

No definition available.

+ Details

Name:	five_PercentageOfUnusedLineOfCreditFacilityFee
Namespace Prefix:	five_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Servicing Fee

+ References

No definition available.

+ Details

Name:	five_ServicingFee
Namespace Prefix:	five_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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.

+ References

No definition available.

+ Details

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

- Definition

For an unclassified balance sheet, the carrying amount (net of accumulated amortization) as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399

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 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DeferredFinanceCostsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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 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

+ Details

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

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ 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 Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585

Reference 3: 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=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_ProceedsFromLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	five_InterestRateOnDebtInstrumentsAxis=us-gaap_PrimeRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=five_ExcessAvailabilityGreaterThanOrEqualToSeventyFivePercentageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=five_ExcessAvailabilityLessThanSeventyFivePercentageButGreaterThanOrEqualToThirtyThreePercentageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=five_ExcessAvailabilityLessThanThirtyThreePercentageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	five_InterestRateOnDebtInstrumentsAxis=five_LiborPlusMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=five_BorrowingCapacityIncreaseUnderCertainConditionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Financing Transactions, Line of Credit and Note Payable (Line of Credit) (Details) - USD ($)	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Debt Instrument [Line Items]
Increase in revolving credit facility	$ 0	$ 7,000,000	$ 0
Servicing Fee	12,000
Line of Credit Borrowed and Repaid During Period		$ 7,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility maximum borrowings	20,000,000
Issuance of letters of credit	$ 5,000,000
Borrowing base percentage (percent)	90.00%
Deferred financing costs			$ 50.0
Percentage of unused credit facility fee (percent)	0.375%
Excess collateral availability percentage (percent)	10.00%
Revolving credit facility collateral amount	$ 3,000,000
Letter of credit fee (percentage)	2.00%
Revolving Credit Facility [Member] \| Prime Rate [Member] \| Excess Availability Greater Than Or Equal To 75% [Member]
Debt Instrument [Line Items]
Interest rate on borrowings (percent)	0.75%
Revolving Credit Facility [Member] \| Prime Rate [Member] \| Excess Availability Less Than 75% But Greater Than Or Equal To 33% [Member]
Debt Instrument [Line Items]
Interest rate on borrowings (percent)	1.00%
Revolving Credit Facility [Member] \| Prime Rate [Member] \| Excess Availability Less Than 33% [Member]
Debt Instrument [Line Items]
Interest rate on borrowings (percent)	1.25%
Excess interest on available borrowings	33.00%
Revolving Credit Facility [Member] \| Prime Rate [Member] \| Minimum [Member] \| Excess Availability Greater Than Or Equal To 75% [Member]
Debt Instrument [Line Items]
Excess interest on available borrowings	75.00%
Revolving Credit Facility [Member] \| Prime Rate [Member] \| Minimum [Member] \| Excess Availability Less Than 75% But Greater Than Or Equal To 33% [Member]
Debt Instrument [Line Items]
Excess interest on available borrowings	33.00%
Revolving Credit Facility [Member] \| Prime Rate [Member] \| Maximum [Member] \| Excess Availability Less Than 75% But Greater Than Or Equal To 33% [Member]
Debt Instrument [Line Items]
Excess interest on available borrowings	75.00%
Revolving Credit Facility [Member] \| LIBOR Plus [Member] \| Excess Availability Greater Than Or Equal To 75% [Member]
Debt Instrument [Line Items]
Interest rate on borrowings (percent)	1.75%
Revolving Credit Facility [Member] \| LIBOR Plus [Member] \| Excess Availability Less Than 75% But Greater Than Or Equal To 33% [Member]
Debt Instrument [Line Items]
Interest rate on borrowings (percent)	2.00%
Revolving Credit Facility [Member] \| LIBOR Plus [Member] \| Excess Availability Less Than 33% [Member]
Debt Instrument [Line Items]
Interest rate on borrowings (percent)	2.25%
Revolving Credit Facility [Member] \| LIBOR Plus [Member] \| Minimum [Member] \| Excess Availability Greater Than Or Equal To 75% [Member]
Debt Instrument [Line Items]
Excess interest on available borrowings	75.00%
Revolving Credit Facility [Member] \| LIBOR Plus [Member] \| Minimum [Member] \| Excess Availability Less Than 75% But Greater Than Or Equal To 33% [Member]
Debt Instrument [Line Items]
Excess interest on available borrowings	33.00%
Revolving Credit Facility [Member] \| LIBOR Plus [Member] \| Maximum [Member] \| Excess Availability Less Than 75% But Greater Than Or Equal To 33% [Member]
Debt Instrument [Line Items]
Excess interest on available borrowings	75.00%
Borrowing Capacity Increase Under Certain Conditions [Member]
Debt Instrument [Line Items]
Revolving credit facility maximum borrowings	$ 30,000,000