Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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- Definition

The period over which the entity typically manages its level of exposure to the risk of currency-exchange fluctuations by hedging a portion of its currency exposures anticipated over the ensuing period.

+ References

No definition available.

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- Definition

The percentage of effectiveness of derivative instruments.

+ References

No definition available.

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- Definition

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=112277219&loc=d3e80748-113994

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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

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- Definition

Floor rate on an interest rate derivative such as an interest rate floor or collar. If market rates falls below the floor rate, a payment or receipt is triggered on the contract.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as hedging instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959

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-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959

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Derivatives - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016	May 31, 2018	Jan. 16, 2015
Derivatives, Fair Value [Line Items]
Amounts to be reclassified into earnings	$ 8,000
Swap Agreement 2018
Derivatives, Fair Value [Line Items]
Derivative, floor interest rate	0.00%
Forward Currency-Exchange Contracts \| Derivatives Not Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Loss on foreign currency derivative instruments, not designated as hedging	$ 27,000	$ 1,367,000	$ 797,000
Cash Flow Hedging \| Derivatives Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Rate of effectiveness of derivative agreement	100.00%
Cash Flow Hedging \| Swap Agreement 2018 \| Derivatives Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Notional amount				$ 15,000,000
Derivative, fixed interest rate				3.15%
Cash Flow Hedging \| Swap Agreement 2015 \| Derivatives Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Notional amount					$ 10,000,000
Cash Flow Hedging \| Swap Agreement 2015 \| Derivatives Designated as Hedging Instruments \| LIBOR
Derivatives, Fair Value [Line Items]
Derivative, fixed interest rate					1.50%
Cash Flow Hedging \| Forward Currency-Exchange Contracts \| Derivatives Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Period over which entity manages its level of exposure of risk	12 months