IMPAIRMENT CHARGES (Details) (USD $)	3 Months Ended	12 Months Ended
Dec. 29, 2012	Dec. 29, 2012 item	Dec. 31, 2011 item	Jan. 01, 2011 item
IMPAIRMENT CHARGES
Term of treasury note		10 years
Number of underperforming stores		26	14	15
Impairment charge	$ 1,100,000	$ 1,100,000	$ 719,000	$ 974,000

The impairment charge against earnings from the write down of underperforming stores.

No definition available.

Name:	cach_AssetImpairmentChargesUnderperformingStores
Namespace Prefix:	cach_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration