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Significant Accounting Policies (Details 1) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 3 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Sep. 30, 2014
Goodwill [Roll Forward]        
Goodwill $ 850us-gaap_Goodwill      
Goodwill impairment (11,350)us-gaap_GoodwillImpairmentLoss 0us-gaap_GoodwillImpairmentLoss (44,257)us-gaap_GoodwillImpairmentLoss  
Goodwill 0us-gaap_Goodwill 850us-gaap_Goodwill    
Merchandising        
Goodwill [Roll Forward]        
Goodwill 850us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= mso_MerchandisingMember		      
Goodwill impairment (850)us-gaap_GoodwillImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= mso_MerchandisingMember		     (900)us-gaap_GoodwillImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= mso_MerchandisingMember
Goodwill $ 0us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= mso_MerchandisingMember