Annual report pursuant to Section 13 and 15(d)

Stock Based Compensation (Details Textual)

v2.4.1.9
Stock Based Compensation (Details Textual)
3 Months Ended 12 Months Ended 12 Months Ended
Dec. 28, 2013
Dec. 27, 2014
USD ($)
Dec. 28, 2013
USD ($)
Dec. 29, 2012
Dec. 27, 2014
Director Equity Plan [Member]
USD ($)
Dec. 28, 2013
Director Equity Plan [Member]
USD ($)
Dec. 27, 2014
2006 Stock Option Plan [Member]
Awards
Dec. 27, 2014
2006 Stock Option Plan [Member]
Maximum [Member]
Dec. 27, 2014
2001 Restricted Stock Plan [Member]
USD ($)
Dec. 28, 2013
2001 Restricted Stock Plan [Member]
USD ($)
Dec. 27, 2014
Equity Incentive Plan (2011 Plan) [Member]
Dec. 27, 2014
Employee Stock Purchase Plan [Member]
USD ($)
Dec. 28, 2013
Employee Stock Purchase Plan [Member]
USD ($)
Dec. 27, 2014
Employee Stock Purchase Plan [Member]
Minimum [Member]
Dec. 27, 2014
Employee Stock Purchase Plan [Member]
Minimum [Member]
United States [Member]
USD ($)
Dec. 27, 2014
Employee Stock Purchase Plan [Member]
Minimum [Member]
United Kingdom [Member]
GBP (£)
Dec. 27, 2014
Employee Stock Purchase Plan and U.K. Plan [Member]
Dec. 27, 2014
Nonemployee Director Equity and Deferred Compensation Plan [Member]
USD ($)
Stock Option Plans (Textual) [Abstract]                                    
Shares available for issuance         25,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= snhy_DirectorEquityPlanMember
  1,125,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_AwardTypeAxis
= snhy_TwoThousandAndSixStockOptionPlanMember
  928,125us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_AwardTypeAxis
= snhy_TwoThousandAndOneStockOptionPlanMember
                222,749us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_AwardTypeAxis
= snhy_NonemployeeDirectorEquityAndDeferredCompensationPlanMember
Exercise price per share not less than fair value percent             110.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
/ us-gaap_AwardTypeAxis
= snhy_TwoThousandAndSixStockOptionPlanMember
                     
Exercise price per share more than voting stock             10.00%snhy_ExercisePricePerShareMoreThanVotingStock
/ us-gaap_AwardTypeAxis
= snhy_TwoThousandAndSixStockOptionPlanMember
                     
Stock options maximum term (in years)               10 years                    
Number of awards granted under 2006 plan             0snhy_ShareBasedCompensationArrangementByShareBasedPaymentNumberOfAwardsGrantedUnderPlan
/ us-gaap_AwardTypeAxis
= snhy_TwoThousandAndSixStockOptionPlanMember
                     
Minimum period before shares become non-forfeitable (in months)                 6 months                  
Plan Expiration year                 2011                  
Aggregate shares of restricted stock grant 103,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod   90,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod 89,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod             1,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= snhy_EquityIncentivePlanTwoThousandAndElevenPlanMember
1,096,875us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockMember
           
Remaining number of shares to be issued         270,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= snhy_DirectorEquityPlanMember
          732,062us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= snhy_EquityIncentivePlanTwoThousandAndElevenPlanMember
          653,393us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= snhy_EmployeeStockPurchasePlanAndUnitedKingdomPlanMember
 
Restricted stock expense                 $ 2,961,000us-gaap_RestrictedStockExpense
/ us-gaap_AwardTypeAxis
= snhy_TwoThousandAndOneStockOptionPlanMember
$ 2,234,000us-gaap_RestrictedStockExpense
/ us-gaap_AwardTypeAxis
= snhy_TwoThousandAndOneStockOptionPlanMember
               
Total unrecognized compensation   5,600,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized                                
Recognized weighted average period (in years)   1 year 8 months 45 days                                
Rate of common stock at market value                       85.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockMember
           
Ratio for additional common stock shares issued, under ESPP   6snhy_EmployeeStockPurchasePlanIssueOfAdditionalCommonStockSharesRatio                                
Shares allowed to be purchased by U.S. employees and U.K. employees                             25,000snhy_ShareBasedCompensationCommonStockAllowedToPurchaseOnMarketValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementBusinessSegmentsAxis
= country_US
1,500snhy_ShareBasedCompensationCommonStockAllowedToPurchaseOnMarketValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementBusinessSegmentsAxis
= country_GB
   
Allowable purchase rate of common stock based on annual salary                           10.00%snhy_ShareBasedCompensationAllowablePurchaseRateOfCommonStockBasedOnAnnualSalary
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
       
Number of shares purchased by employees                       25,238snhy_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesPurchased
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockMember
34,653snhy_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesPurchased
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockMember
         
Weighted average price                       $ 33.52us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockMember
$ 24.80us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockMember
         
Share based Compensation Expenses   173,000us-gaap_EmployeeBenefitsAndShareBasedCompensation 206,000us-gaap_EmployeeBenefitsAndShareBasedCompensation                              
Stock option granted, shares         17,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_PlanNameAxis
= snhy_DirectorEquityPlanMember
16,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_PlanNameAxis
= snhy_DirectorEquityPlanMember
                      375us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= snhy_NonemployeeDirectorEquityAndDeferredCompensationPlanMember
Cash fees paid                                   3,000us-gaap_DeferredCompensationArrangementWithIndividualDistributionsPaid
/ us-gaap_AwardTypeAxis
= snhy_NonemployeeDirectorEquityAndDeferredCompensationPlanMember
Fee for the chairs of each Board committee         125.00%snhy_RateOfAdditionalFeesReceivedBasedOnNormalCompensation
/ us-gaap_PlanNameAxis
= snhy_DirectorEquityPlanMember
                        25.00%snhy_RateOfAdditionalFeesReceivedBasedOnNormalCompensation
/ us-gaap_AwardTypeAxis
= snhy_NonemployeeDirectorEquityAndDeferredCompensationPlanMember
Deferred stock units outstanding   0us-gaap_DeferredCompensationArrangementWithIndividualCommonStockReservedForFutureIssuance                                
Common stock shares for each nonemployee director         500us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionQuantityOfSecuritiesIssued
/ us-gaap_PlanNameAxis
= snhy_DirectorEquityPlanMember
                         
Share based Compensation Expenses under Director's plan         $ 677,000us-gaap_StockOptionPlanExpense
/ us-gaap_PlanNameAxis
= snhy_DirectorEquityPlanMember
$ 592,000us-gaap_StockOptionPlanExpense
/ us-gaap_PlanNameAxis
= snhy_DirectorEquityPlanMember