Operating Segments (Detail) - Operating Profit (Loss) for Each Segment (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Net Sales to Customers
Net Sales to Customers	$ 80,413mgpi_SalesRevenuNet	$ 78,996mgpi_SalesRevenuNet
Depreciation and Amortization
Depreciation and Amortization	3,091	3,042
Income (Loss) before Income Taxes
Income (Loss) before Income Taxes	8,129	4,866
Distillery Products [Member]
Net Sales to Customers
Net Sales to Customers	65,862	64,932
Depreciation and Amortization
Depreciation and Amortization	2,171	2,089
Income (Loss) before Income Taxes
Income (Loss) before Income Taxes	11,138	5,452
Ingredient Solutions [Member]
Net Sales to Customers
Net Sales to Customers	14,551	14,064
Depreciation and Amortization
Depreciation and Amortization	575	583
Income (Loss) before Income Taxes
Income (Loss) before Income Taxes	1,333	299
Corporate [Member]
Depreciation and Amortization
Depreciation and Amortization	345	370
Income (Loss) before Income Taxes
Income (Loss) before Income Taxes	$ (4,342)	$ (885)

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, sales discounts, and excise taxes.

+ References

No definition available.

+ Details

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- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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- Definition

Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h)(1)(i))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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