Business Organization and Summary Of Significant Accounting Policies - Cash and Cash Equivalents (Narrative) (Details)	12 Months Ended
Jan. 31, 2015
Minimum [Member]
Cash and Cash Equivalents [Line Items]
Threshold period for third-party credit and debit transactions	3 days
Maximum [Member]
Cash and Cash Equivalents [Line Items]
Threshold period for third-party credit and debit transactions	5 days

Represents the threshold period for payments due from banks for third-party credit card and debit transactions to be recognized as cash and cash equivalents.

No definition available.

Name:	chs_ThresholdPeriodPaymentsDueFromBanksCreditCardandDebitTransactions
Namespace Prefix:	chs_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration