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Goodwill And Intangible Assets (Narrative) (Details) (USD $)
0 Months Ended 3 Months Ended 12 Months Ended
Feb. 03, 2014
May 02, 2015
May 03, 2014
Jan. 31, 2015
Feb. 03, 2014
Finite-Lived Intangible Assets [Line Items]          
Intangible assets not subject to amortization   $ 20,800,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill   $ 21,000,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill  
Amortization expense related to intangible assets   930,000us-gaap_AmortizationOfIntangibleAssets 988,000us-gaap_AmortizationOfIntangibleAssets    
Intangible assets acquired (65,000,000)us-gaap_FinitelivedIntangibleAssetsAcquired1 0us-gaap_FinitelivedIntangibleAssetsAcquired1 65,065,000us-gaap_FinitelivedIntangibleAssetsAcquired1    
Transaction costs 100,000us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts       100,000us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
Intangible Assets, Explanation of Significant Deletions       .2  
Primarily Owned and Licensed Trademarks [Member]          
Finite-Lived Intangible Assets [Line Items]          
Amortization expense related to intangible assets   $ 900,000us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cal_PrimarilyOwnedAndLicensedTrademarksMember
$ 1,000,000us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= cal_PrimarilyOwnedAndLicensedTrademarksMember
   
Trademarks [Member]          
Finite-Lived Intangible Assets [Line Items]          
Intangible assets, estimated useful lives 40 years        
Minimum [Member]          
Finite-Lived Intangible Assets [Line Items]          
Intangible assets, estimated useful lives   15 years      
Maximum [Member]          
Finite-Lived Intangible Assets [Line Items]          
Intangible assets, estimated useful lives   40 years