Basis Of Presentation Policies	6 Months Ended
Sep. 28, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis Of Presentation	1. Unaudited Condensed Consolidated Financial Statements In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments, which are normal and recurring in nature, necessary to present fairly the financial position of Seneca Foods Corporation (the “Company”) as of September 28, 2013 and results of its operations and its cash flows for the interim periods presented. All significant intercompany transactions and accounts have been eliminated in consolidation. The March 31, 2013 balance sheet was derived from the audited consolidated financial statements. The results of operations for the three and six month periods ended September 28, 2013 are not necessarily indicative of the results to be expected for the full year. During six months ended September 28, 2013, the Company sold $52,199,000 of Green Giant finished goods inventory to General Mills Operations, LLC (“GMOL”) for cash, on a bill and hold basis, as compared to $38,593,000 for the six months ended September 29, 2012. Under the terms of the bill and hold agreement, title to the specified inventory transferred to GMOL. The Company believes it has met the criteria required for bill and hold treatment. The accounting policies followed by the Company are set forth in Note 1 to the Company's Consolidated Financial Statements in the Company's 2013 Annual Report on Form 10-K. Other footnote disclosures normally included in annual financial statements prepared in accordance with accounting principles generally accepted in the United States have been condensed or omitted. These unaudited condensed consolidated financial statements should be read in conjunction with the financial statements and notes included in the Company's 2013 Annual Report on Form 10-K. All references to years are fiscal years ended or ending March 31 unless otherwise indicated. Certain percentage tables may not foot due to rounding.

Basis Of Presentation Policies

6 Months Ended

Sep. 28, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

1. Unaudited Condensed Consolidated Financial Statements

In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments, which are normal and recurring in nature, necessary to present fairly the financial position of Seneca Foods Corporation (the “Company”) as of September 28, 2013 and results of its operations and its cash flows for the interim periods presented. All significant intercompany transactions and accounts have been eliminated in consolidation. The March 31, 2013 balance sheet was derived from the audited consolidated financial statements.

The results of operations for the three and six month periods ended September 28, 2013 are not necessarily indicative of the results to be expected for the full year.

During six months ended September 28, 2013, the Company sold $52,199,000 of Green Giant finished goods inventory to General Mills Operations, LLC (“GMOL”) for cash, on a bill and hold basis, as compared to $38,593,000 for the six months ended September 29, 2012. Under the terms of the bill and hold agreement, title to the specified inventory transferred to GMOL. The Company believes it has met the criteria required for bill and hold treatment.

The accounting policies followed by the Company are set forth in Note 1 to the Company's Consolidated Financial Statements in the Company's 2013 Annual Report on Form 10-K.

Other footnote disclosures normally included in annual financial statements prepared in accordance with accounting principles generally accepted in the United States have been condensed or omitted. These unaudited condensed consolidated financial statements should be read in conjunction with the financial statements and notes included in the Company's 2013 Annual Report on Form 10-K.

All references to years are fiscal years ended or ending March 31 unless otherwise indicated. Certain percentage tables may not foot due to rounding.