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Goodwill and Other Intangible Assets (Segment Information) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Mar. 31, 2014
Goodwill    
Goodwill $ 127,934us-gaap_Goodwill $ 127,934us-gaap_Goodwill
UGG brand    
Goodwill    
Goodwill 6,101us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= deck_UGGWholesaleSegmentMember		 6,101us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= deck_UGGWholesaleSegmentMember
Sanuk brand    
Goodwill    
Goodwill 113,944us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= deck_SanukWholesaleSegmentMember		 113,944us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= deck_SanukWholesaleSegmentMember
Other brands    
Goodwill    
Goodwill $ 7,889us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= deck_OtherWholesaleSegmentMember		 $ 7,889us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= deck_OtherWholesaleSegmentMember