Debt Covenant, Minimum EBITDA Requirement

No definition available.

Name:	snhy_DebtCovenantMinimumEBITDARequirement
Namespace Prefix:	snhy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt covenant, annual increase of minimum tangible net worth, net income percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	snhy_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt to earning before income tax depreciation and amortization.

+ References

No definition available.

+ Details

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Namespace Prefix:	snhy_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Earning before income tax depreciation and amortization to interest expenses.

+ References

No definition available.

+ Details

Name:	snhy_EarningBeforeIncomeTaxDepreciationandAmortizationtoInterestExpenses
Namespace Prefix:	snhy_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of credit amortization.

+ References

No definition available.

+ Details

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Namespace Prefix:	snhy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	snhy_LongTermDebtTextualAbstract
Namespace Prefix:	snhy_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of credit facilities.

+ References

No definition available.

+ Details

Name:	snhy_NumberOfCreditFacilities
Namespace Prefix:	snhy_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of Debt Covenants

+ References

No definition available.

+ Details

Name:	snhy_NumberofDebtCovenants
Namespace Prefix:	snhy_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of minimum financial levels (for example, tangible net worth and working capital) and achievement of certain financial ratios (for example, working capital ratio and debt service coverage ratio), and adherence to certain clauses which generally require or restrict certain actions (for example, entering into a debt arrangement with equal or greater seniority, and selling or discontinuing a certain business segment or material subsidiary) to be in compliance with the covenant clauses of the debt agreement. May also include a discussion of the adverse consequences that would result if the entity violates or fails to satisfy the covenants.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentCovenantDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the debt instrument was issued, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentIssuanceDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of covenants that limit or prohibit certain actions or activities without the lender's prior consent within a specified period of time or until certain specified targets are achieved for example, reduction of the debt or an increase in net worth to a specified amount).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(e))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph e

-Article 4

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentRestrictiveCovenants
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the frequency of periodic payments, which may be presented in a variety of ways (for example, monthly, quarterly, annually).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityFrequencyOfPayments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_CreditFacilityAxis=snhy_FacilityBMember
Namespace Prefix:
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Period Type:

- Details

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Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=snhy_FacilityBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=snhy_FacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Long-Term Debt (Details) (USD $)	0 Months Ended	12 Months Ended
Long-Term Debt (Details) (USD $)	Aug. 01, 2011 CreditFacility	Dec. 27, 2014 covenant	Dec. 28, 2013
Long-Term Debt (Textual) [Abstract]
Effective date	Aug. 01, 2011
Number of credit facilities	3snhy_NumberOfCreditFacilities
Credit facilities, maximum capacity	$ 50,000,000
Required minimum EBITDA (not less than)		5,000,000
Number of debt covenants		2snhy_NumberofDebtCovenants
Funded debt to EBITDA		3.0
EBIT to Interest Expense ratio		2.5
Line of Credit Amortization		0snhy_LineOfCreditAmortization	0snhy_LineOfCreditAmortization
Facility B [Member]
Long-Term Debt (Textual) [Abstract]
Credit facilities, maximum capacity		35,000,000
Line of Credit Facility, Interest Rate Description		P30D
Facility [Member]
Long-Term Debt (Textual) [Abstract]
Credit facilities, maximum capacity		15,000,000
Variable interest rate		1.45%
Line of Credit Facility, Interest Rate Description		P30D
Debt Instrument, Restrictive Covenants		92000000
Debt covenant, Minimum Tangible Net Worth		5000000
Debt Covenant, Minimum Tangible Net Worth, Annual Increase by Percentage of Net Income		50.00%
Facility B [Member]
Long-Term Debt (Textual) [Abstract]
Expiration date		Aug. 01, 2016
Funded debt to EBITDA		3.0
EBIT to Interest Expense ratio		2.5
Facility B [Member] \| Base Rate [Member] \| Minimum [Member]
Long-Term Debt (Textual) [Abstract]
Variable interest rate		(0.25%)
Facility B [Member] \| Base Rate [Member] \| Maximum [Member]
Long-Term Debt (Textual) [Abstract]
Variable interest rate		0.00%
Facility B [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Minimum [Member]
Long-Term Debt (Textual) [Abstract]
Variable interest rate		1.45%
Facility B [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Maximum [Member]
Long-Term Debt (Textual) [Abstract]
Variable interest rate		2.25%
Facility [Member]
Long-Term Debt (Textual) [Abstract]
Expiration date		Aug. 01, 2016
Secured Debt [Member]
Long-Term Debt (Textual) [Abstract]
Payments on credit facility		Facility C requires monthly payments of interest for the first 24 months and monthly payments of principal plus accrued interest for 60 months
Secured Debt [Member] \| Secured Debt [Member]
Long-Term Debt (Textual) [Abstract]
Credit facilities, maximum capacity		$ 15,000,000