| Commitments and Contingencies Re-insurance losses on claims on individual basis (Details) (USD $) | 12 Months Ended | 
|---|---|
| Dec. 27, 2014 | |
| Commitments and Contingencies Disclosure [Abstract] | |
| Reinsurance Purchased For Stop Losses On Individual Basis | $ 155snhy_ReinsurancePurchasedForStopLossesOnIndividualBasis | 
| Reinsurance Purchased For Stop Losses on Aggregate Basis | $ 7,200snhy_ReinsurancePurchasedForStopLossesonAggregateBasis | 
| X | ||||||||||
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- Definition Reinsurance Purchased For Stop Losses on Aggregate Basis No definition available. 
 | 
| X | ||||||||||
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- Definition Reinsurance Purchased For Stop Losses On Individual Basis No definition available. 
 | 
| X | ||||||||||
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- Details 
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