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Other Operating Income and Expenses (detail) (USD $) | 12 Months Ended |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 31, 2012 LeSueur Mn [Member] | Mar. 31, 2013 Other Operating Expense [Member] | Mar. 31, 2012 Other Operating Expense [Member] | Mar. 31, 2011 Other Operating Expense [Member] | Mar. 31, 2011 Reversal of Environmental Reserve [Member] | Mar. 31, 2013 Independent Foods [Member] | Mar. 31, 2011 Lebanon [Member] | Mar. 31, 2013 Cambria, WI [Member]
Component of Operating Other Cost and Expense [Line Items] |  |  |  |  |  |  |  |
Gain on sale of other assets |  |  |  | $ 249,000 | $ 250,000 |  |  |
Loss On Sale Of Other Assets |  | 252,000 | 149,000 | 391,000 |  |  |  |
Gain on Disposition of Property | 665,000 |  |  |  |  |  |  | 252,000
Gain on Purchase of Business |  |  |  |  |  | $ 1,971,000 | $ 736,000 |

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- Definition The gain included in results of operations resulting from the sale or disposal of other assets. + References No definition available. + Details
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- Definition The loss included in results of operations resulting from the sale or disposal of other assets. + References No definition available. + Details
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- Definition The gains (losses) included in results of operations resulting from the sale or disposal of property, plant and equipment, which do not qualify for treatment as discontinued operations. This item does not include any gain (loss) recognized on the sale of oil and gas property or timber property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 37, 41, 42, 43, 45 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2443-110228 + Details
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- Definition Amount of the excess of the fair value of acquired net assets over the cost of an acquired business after pro rata reduction of the amounts that otherwise would have been assigned to acquired assets except financial assets other than investments accounted for by the equity method, assets to be disposed of by sale, deferred tax assets, prepaid assets relating to pension and postretirement benefit plans, and other current assets. This amount is considered an extraordinary item and often referred to as negative goodwill. This element is gross of the related tax effect. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 44, 45, 46 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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