XML 32 R52.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Stockholders' Equity (narrative) (detail) (USD $) | 12 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2013
Cash dividends paid on preferred stock | $ 23,000 us-gaap_DividendsPreferredStockCash |  |
401 (k) match stock amount | 2,200,000 senea_Definedcontributionplanemployerdiscretionarycontributionvalueofshares | 2,000,000 senea_Definedcontributionplanemployerdiscretionarycontributionvalueofshares |
6% Cumulative Preferred Stock [Member] |  |  |
Preferred Stock, Dividend Rate, Percentage | 6.00%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_CumulativePreferredStockMember |  |
Preferred Stock, Par or Stated Value Per Share | $ 0.25 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_CumulativePreferredStockMember |  |
Preferred Stock, Shares Authorized | 200,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_CumulativePreferredStockMember |  |
Preferred Stock, Shares Outstanding | 200,000 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CumulativePreferredStockMember | 200,000 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CumulativePreferredStockMember | 200,000 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CumulativePreferredStockMember
Cash dividends paid on preferred stock | 3,000 us-gaap_DividendsPreferredStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_CumulativePreferredStockMember |  |
10% Nonredeemable Convertible Preferred Stock [Member] |  |  |
Preferred Stock, Dividend Rate, Percentage | 10.00%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_NonredeemableConvertiblePreferredStockMember |  |
Preferred Stock, Par or Stated Value Per Share | $ 0.025 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_NonredeemableConvertiblePreferredStockMember |  |
Preferred Stock, Shares Authorized | 1,400,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_NonredeemableConvertiblePreferredStockMember |  |
Preferred Stock, Shares Outstanding | 807,240 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_NonredeemableConvertiblePreferredStockMember | 807,240 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_NonredeemableConvertiblePreferredStockMember | 807,240 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_NonredeemableConvertiblePreferredStockMember
10% Series A Nonredeemable Convertible Preferred Stock [Member] |  |  |
Preferred Stock, Dividend Rate, Percentage | 10.00%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = senea_SeriesAaNonredeemableConvertiblePreferredStockMember |  |
Share For Share Conversion Number | 20 senea_ShareForShareConversionNumber / us-gaap_StatementClassOfStockAxis = senea_SeriesAaNonredeemableConvertiblePreferredStockMember |  |
Preferred Stock, Shares Outstanding | 407,240 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = senea_SeriesAaNonredeemableConvertiblePreferredStockMember |  |
10% Series B Nonredeemable Convertible Preferred Stock [Member] |  |  |
Share For Share Conversion Number | 30 senea_ShareForShareConversionNumber / us-gaap_StatementClassOfStockAxis = senea_SeriesBNonredeemableConvertiblePreferredStockMember |  |
Preferred Stock, Shares Outstanding | 400,000 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = senea_SeriesBNonredeemableConvertiblePreferredStockMember |  |
Participating Preferred Stock [Member] |  |  |
Preferred Stock Liquidation Preference | $ 12 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |
Preferred Stock, Par or Stated Value Per Share | $ 0.025 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |
Stated Value Per Share | $ 11.931 senea_Stockstatedvaluepershare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |
Preferred Stock, Shares Authorized | 90,826 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |
Preferred Stock, Shares Outstanding | 90,826 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember | 90,901 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember | 91,962 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember
Stock Conversions | 75 us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |
Cash dividends paid on preferred stock | 20,000 us-gaap_DividendsPreferredStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |
2003 Series Participating Preferred Stock [Member] |  |  |
Preferred Stock Liquidation Preference | $ 15.5 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |
Preferred Stock, Par or Stated Value Per Share | $ 0.025 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |
Preferred Stock, Shares Authorized | 50,500 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |
Preferred Stock, Shares Outstanding | 50,500 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 257,790 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 262,790 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember
Stock Conversions | 207,290 us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |
Price Per Share | $ 16.6 us-gaap_SaleOfStockPricePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |
Preferred Stock Shares Issued | 967,742 us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |
No Par Value Preferred Stock [Member] |  |  |
Preferred Stock, Shares Authorized | 30,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember |  |
Class A Preferred Stock [Member] |  |  |
Preferred Stock, Par or Stated Value Per Share | $ 0.025 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember |  |
Preferred Stock, Shares Authorized | 8,200,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember |  |
Class A Preferred Non Designated Stock [Member] |  |  |
Preferred Stock, Shares Authorized | 6,658,674 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_PreferredClassAMember |  |
Common Class A Member |  |  |
Common Stock Voting Right Per Share | $ 0.05 senea_CommonStockVotingRightPerShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |
Treasury Stock, Value, Acquired, Cost Method | 32,000,000 us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |
Treasury Stock Shares Acquired | 1,166,795 us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |
Common Class B Member |  |  |
Stock Issued For Bonus Program Value | 56,000 senea_StockIssuedForBonusProgramValue / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |  |
Stock Issued For Bonus Program Shares | 1,720 senea_StockIssuedForBonusProgramShares / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |  |
Treasury Stock [Member] |  |  |
Treasury Stock, Value, Acquired, Cost Method | 61,300,000 us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember |  |
Treasury Stock Shares Acquired | 2,146,314 us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember |  |
401 (k) match shares | 83,240 senea_Definedcontributionplanemployerdiscretionarycontributionshareamount / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember |  |
401 (k) match stock amount | $ 2,100,000 senea_Definedcontributionplanemployerdiscretionarycontributionvalueofshares / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember |  |

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