DISCLOSURES ABOUT SEGMENTS OF AN ENTERPRISE AND RELATED INFORMATION (Details 3) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Reconciliation of assets of reportable segments to the consolidated financial statements
Total assets	$ 263,732	$ 230,361
Intangible assets not allocated to segments	10,938
Intersegment receivable	36,551	31,523
Reportable segments
Reconciliation of assets of reportable segments to the consolidated financial statements
Total assets	429,867	398,059
Membership services segment
Reconciliation of assets of reportable segments to the consolidated financial statements
Total assets	310,317	297,012
Retail segment
Reconciliation of assets of reportable segments to the consolidated financial statements
Total assets	119,550	101,047
Unallocated amount
Reconciliation of assets of reportable segments to the consolidated financial statements
Intangible assets not allocated to segments	7,885	8,851
Corporate unallocated
Reconciliation of assets of reportable segments to the consolidated financial statements
Total assets	8,755	8,625
Intersegment elimination
Reconciliation of assets of reportable segments to the consolidated financial statements
Intersegment receivable	$ (182,775)	$ (185,174)