No definition available.

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

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

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

- References

No definition available.

+ Details

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

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26610-111562

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563

+ Details

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

- Definition

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

No definition available.

+ Details

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

- Definition

Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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_DeferredCompensationPlanAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

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

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. 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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-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 4: http://fasb.org/us-gaap/role/ref/legacyRef
-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

+ Details

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

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=chs_MunicipalSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=chs_USGovernmentAgenciesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_CorporateBondSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_CommercialPaperMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Fair Value Measurements - Financial Assets Valued on a Recurring Basis (Details) - USD ($) $ in Thousands	May 04, 2019	Feb. 02, 2019	May 05, 2018
Noncurrent Assets
Deferred compensation plan	$ 6,872	$ 6,644	$ 7,044
Total assets	70,036	69,342	68,551
Financial Liabilities:
Long-term debt	53,750	57,500	64,868
Quoted Prices in Active Markets for Identical Assets (Level 1)
Noncurrent Assets
Deferred compensation plan	6,872	6,644	7,044
Total assets	7,200	7,355	7,355
Financial Liabilities:
Long-term debt	0	0	0
Significant Other Observable Inputs (Level 2)
Noncurrent Assets
Deferred compensation plan	0	0	0
Total assets	62,836	61,987	61,196
Financial Liabilities:
Long-term debt	53,750	57,500	65,309
Significant Unobservable Inputs (Level 3)
Noncurrent Assets
Deferred compensation plan	0	0	0
Total assets	0	0	0
Financial Liabilities:
Long-term debt	0	0	0
Municipal securities
Current Assets
Marketable securities			3,462
Municipal securities \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Current Assets
Marketable securities			0
Municipal securities \| Significant Other Observable Inputs (Level 2)
Current Assets
Marketable securities			3,462
Municipal securities \| Significant Unobservable Inputs (Level 3)
Current Assets
Marketable securities			0
U.S. government agencies
Current Assets
Marketable securities			12,755
U.S. government agencies \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Current Assets
Marketable securities			0
U.S. government agencies \| Significant Other Observable Inputs (Level 2)
Current Assets
Marketable securities			12,755
U.S. government agencies \| Significant Unobservable Inputs (Level 3)
Current Assets
Marketable securities			0
Corporate bonds
Current Assets
Marketable securities	59,893	60,281	42,992
Corporate bonds \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Current Assets
Marketable securities	0	0	0
Corporate bonds \| Significant Other Observable Inputs (Level 2)
Current Assets
Marketable securities	59,893	60,281	42,992
Corporate bonds \| Significant Unobservable Inputs (Level 3)
Current Assets
Marketable securities	0	0	0
Commercial paper
Current Assets
Marketable securities	2,943	1,706	1,987
Commercial paper \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Current Assets
Marketable securities	0	0	0
Commercial paper \| Significant Other Observable Inputs (Level 2)
Current Assets
Marketable securities	2,943	1,706	1,987
Commercial paper \| Significant Unobservable Inputs (Level 3)
Current Assets
Marketable securities	0	0	0
Money market accounts
Current Assets
Cash equivalents	328	711	311
Money market accounts \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Current Assets
Cash equivalents	328	711	311
Money market accounts \| Significant Other Observable Inputs (Level 2)
Current Assets
Cash equivalents	0	0	0
Money market accounts \| Significant Unobservable Inputs (Level 3)
Current Assets
Cash equivalents	$ 0	$ 0	$ 0