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Derivative Instruments (Detail)	12 Months Ended
	Dec. 31, 2016
Commodity Contract [Member]
Derivative [Line Items]
Maximum length of time hedged in commodity hedge	12 months

X

- Definition

Maximum Length of Time Hedged in Commodity Hedge

+ References

No definition available.

+ Details

Name:	mgpi_MaximumLengthofTimeHedgedinCommodityHedge
Namespace Prefix:	mgpi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CommodityContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: