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Consolidated Statements of Comprehensive Income (Loss) (Parentheticals) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Change in translation adjustment on non-consolidating foreign subsidiary, tax $ 37us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax $ 8us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax
Change In Pension Plans [Member]    
Change in pension plans and post employment benefits, tax (155)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= mgpi_ChangeInPensionPlansMember		 (166)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= mgpi_ChangeInPensionPlansMember
Change In Post Employment Benefits [Member]    
Change in pension plans and post employment benefits, tax $ (6)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= mgpi_ChangeInPostEmploymentBenefitsMember		 $ (22)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= mgpi_ChangeInPostEmploymentBenefitsMember