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Operating Segments (Detail) - Capital Expenditures By Segment (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Segment Reporting Information [Line Items]    
Capital Expenditures $ 5,851mgpi_CapitalExpenditures $ 7,883mgpi_CapitalExpenditures
Distillery Products [Member]    
Segment Reporting Information [Line Items]    
Capital Expenditures 4,663mgpi_CapitalExpenditures
/ us-gaap_StatementBusinessSegmentsAxis
= mgpi_DistilleryProductsMember		 5,594mgpi_CapitalExpenditures
/ us-gaap_StatementBusinessSegmentsAxis
= mgpi_DistilleryProductsMember
Ingredient Solutions [Member]    
Segment Reporting Information [Line Items]    
Capital Expenditures 358mgpi_CapitalExpenditures
/ us-gaap_StatementBusinessSegmentsAxis
= mgpi_IngredientSolutionsMember		 1,110mgpi_CapitalExpenditures
/ us-gaap_StatementBusinessSegmentsAxis
= mgpi_IngredientSolutionsMember
Other [Member]    
Segment Reporting Information [Line Items]    
Capital Expenditures 0mgpi_CapitalExpenditures
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember		 0mgpi_CapitalExpenditures
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
Corporate [Member]    
Segment Reporting Information [Line Items]    
Capital Expenditures $ 830mgpi_CapitalExpenditures
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember		 $ 1,179mgpi_CapitalExpenditures
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember