Business Organization and Summary Of Significant Accounting Policies - Inventories (Narrative) (Details)	12 Months Ended
Jan. 31, 2015 supplier	Feb. 01, 2014 supplier
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Percentage of cost of goods sold	24.00%chs_PercentageOfCostOfGoodsSold	23.00%chs_PercentageOfCostOfGoodsSold
Number of suppliers with total purchases of 24% and 23%, in 2014 and 2013 respectfully	1	1

Number of Suppliers with Significant Total Purchases

No definition available.

Name:	chs_NumberofSupplierswithSignificantTotalPurchases
Namespace Prefix:	chs_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration