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Goodwill and Intangible Assets (Details 2) (USD $)
In Thousands, unless otherwise specified
Mar. 28, 2015
Schedule of estimated amortization expense  
2014 $ 473us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2015 473us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2016 473us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2017 473us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2018 473us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Total $ 2,365snhy_FiniteLivedIntangibleAssetsAmortizationExpenseUpToFiveYears