XML 90 R74.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Derivative Instruments (Detail) - Commodity Contract | 12 Months Ended
--- | ---
Dec. 31, 2018
Minimum |
Derivative [Line Items] |
Length of time hedged in commodity hedge | 1 month
Maximum |
Derivative [Line Items] |
Length of time hedged in commodity hedge | 24 months

X
- Definition Length of Time Hedged in Commodity Hedge + References No definition available. + Details
Name: | mgpi_LengthofTimeHedgedinCommodityHedge
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: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |