Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets (Details Textual)

v2.4.1.9
Goodwill and Intangible Assets (Details Textual) (USD $)
3 Months Ended 12 Months Ended 9 Months Ended 3 Months Ended
Mar. 28, 2015
Dec. 27, 2014
Sep. 27, 2014
Mar. 29, 2014
Finite-Lived Intangible Assets [Line Items]        
Remaining amortization $ 301,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear      
Subsidiaries [Member]        
Finite-Lived Intangible Assets [Line Items]        
Impairment of carrying value of goodwill 0us-gaap_GoodwillImpairmentLoss
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
0us-gaap_GoodwillImpairmentLoss
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
   
HCT [Member]        
Finite-Lived Intangible Assets [Line Items]        
Impairment of carrying value of goodwill     0us-gaap_GoodwillImpairmentLoss
/ dei_LegalEntityAxis
= snhy_HCTMember
 
Identifiable intangible assets 2,658,000snhy_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedFiniteLivedIntangibles
/ dei_LegalEntityAxis
= snhy_HCTMember
     
Series of Individually Immaterial Business Acquisitions [Member]        
Finite-Lived Intangible Assets [Line Items]        
Identifiable intangible assets 746,000snhy_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedFiniteLivedIntangibles
/ dei_LegalEntityAxis
= snhy_WhiteOakMember
     
Licensing Agreements [Member]        
Finite-Lived Intangible Assets [Line Items]        
Finite-lived Intangible Assets Acquired $ 575us-gaap_FinitelivedIntangibleAssetsAcquired1
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember
    $ 1,075us-gaap_FinitelivedIntangibleAssetsAcquired1
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember