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Restructuring and Strategic Charges (Narrative) (Details) (USD $)
 3 Months Ended
May 02, 2015
Jan. 31, 2015
May 03, 2014
Restructuring Cost and Reserve [Line Items]      
Percent of headquarters and field management eliminated   12.00%us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedPeriodPercent  
Restructuring and strategic charges $ 14,875,000us-gaap_RestructuringCharges $ 16,700,000us-gaap_RestructuringCharges $ 0us-gaap_RestructuringCharges
Lease termination expenses expected over the next 3 fiscal years $ 2,500,000chs_OperatingLeasesLeaseTerminationExpectedLeaseExpenseOvertheNextThreeYears    
Minimum [Member]      
Restructuring Cost and Reserve [Line Items]      
Number of under-performing stores to close from 2015-2017 135chs_NumberofStoreClosuresStartingthisFiscalYearThroughtheNextTwoFiscalYears
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		    
Maximum [Member]      
Restructuring Cost and Reserve [Line Items]      
Number of under-performing stores to close from 2015-2017 140chs_NumberofStoreClosuresStartingthisFiscalYearThroughtheNextTwoFiscalYears
/ us-gaap_RangeAxis
= us-gaap_MaximumMember