| Goodwill and Intangible Assets (Details 2) (USD $) In Thousands, unless otherwise specified | Dec. 27, 2014 | Dec. 28, 2013 | 
|---|---|---|
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross carrying amount | $ 4,479us-gaap_FiniteLivedIntangibleAssetsGross | $ 3,404us-gaap_FiniteLivedIntangibleAssetsGross | 
| Schedule of estimated amortization expense | ||
| 2014 | 389us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths | |
| 2015 | 471us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo | |
| 2016 | 471us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree | |
| 2017 | 471us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour | |
| 2018 | 471us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive | |
| Total | 2,273snhy_FiniteLivedIntangibleAssetsAmortizationExpenseUpToFiveYears | |
| Licensing Agreements [Member] | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross carrying amount | 1,075us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LicensingAgreementsMember | 0us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LicensingAgreementsMember | 
| Sturman (Member) [Member] | Licensing Agreements [Member] | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross carrying amount | $ 1,075us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LicensingAgreementsMember / dei_LegalEntityAxis = snhy_SturmanMemberMember | 
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- Definition Finite lived intangible assets amortization expense up to five years. No definition available. 
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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