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Derivatives (Details) (USD $) | 12 Months Ended |  |  |  | 12 Months Ended |  |  |  |  | 12 Months Ended |  |  |  |  | 12 Months Ended |  |  |  |
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Dec. 28, 2013 | Dec. 29, 2012 | Dec. 31, 2011 | Dec. 28, 2013 Derivatives Designated as Hedging Instruments [Member] Cash Flow Hedging [Member] | Dec. 28, 2013 2006 Swap Agreement [Member] Derivatives Designated as Hedging Instruments [Member] Cash Flow Hedging [Member] | Dec. 28, 2013 2008 Swap Agreement [Member] Derivatives Designated as Hedging Instruments [Member] Cash Flow Hedging [Member] Ratio | Dec. 31, 2011 2008 Swap Agreement [Member] Derivatives Designated as Hedging Instruments [Member] Cash Flow Hedging [Member] | Jan. 01, 2011 2008 Swap Agreement [Member] Derivatives Designated as Hedging Instruments [Member] Cash Flow Hedging [Member] | Jan. 02, 2010 2008 Swap Agreement [Member] Derivatives Designated as Hedging Instruments [Member] Cash Flow Hedging [Member] | Dec. 28, 2013 Interest Rate Swap Agreements [Member] Derivatives Designated as Hedging Instruments [Member] Cash Flow Hedging [Member] | Dec. 28, 2013 Interest Rate Swap Agreements [Member] Derivatives Designated as Hedging Instruments [Member] Other Current Liabilities [Member] | Dec. 29, 2012 Interest Rate Swap Agreements [Member] Derivatives Designated as Hedging Instruments [Member] Other Current Liabilities [Member] | Dec. 28, 2013 Interest Rate Swap Agreements [Member] Derivatives Designated as Hedging Instruments [Member] Other Long Term Liabilities [Member] | Dec. 29, 2012 Interest Rate Swap Agreements [Member] Derivatives Designated as Hedging Instruments [Member] Other Long Term Liabilities [Member] | Dec. 28, 2013 Forward Currency-Exchange Contracts [Member] Derivatives Designated as Hedging Instruments [Member] Cash Flow Hedging [Member] | Dec. 28, 2013 Forward Currency-Exchange Contracts [Member] Derivatives Designated as Hedging Instruments [Member] Other Current Assets [Member] | Dec. 29, 2012 Forward Currency-Exchange Contracts [Member] Derivatives Designated as Hedging Instruments [Member] Other Current Assets [Member] | Dec. 28, 2013 Forward Currency-Exchange Contracts [Member] Derivatives Designated as Hedging Instruments [Member] Other Current Liabilities [Member] | Dec. 29, 2012 Forward Currency-Exchange Contracts [Member] Derivatives Designated as Hedging Instruments [Member] Other Current Liabilities [Member] | Dec. 28, 2013 Forward Currency-Exchange Contracts [Member] Derivatives Not Designated as Hedging Instruments [Member] | Dec. 29, 2012 Forward Currency-Exchange Contracts [Member] Derivatives Not Designated as Hedging Instruments [Member] | Dec. 31, 2011 Forward Currency-Exchange Contracts [Member] Derivatives Not Designated as Hedging Instruments [Member] | Dec. 28, 2013 Forward Currency-Exchange Contracts [Member] Derivatives Not Designated as Hedging Instruments [Member] Other Current Assets [Member] | Dec. 29, 2012 Forward Currency-Exchange Contracts [Member] Derivatives Not Designated as Hedging Instruments [Member] Other Current Assets [Member] | Dec. 28, 2013 Forward Currency-Exchange Contracts [Member] Derivatives Not Designated as Hedging Instruments [Member] Other Current Liabilities [Member] | Dec. 29, 2012 Forward Currency-Exchange Contracts [Member] Derivatives Not Designated as Hedging Instruments [Member] Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative term |  |  |  |  |  |  | P5Y |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate Swaps [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional value |  |  |  |  |  |  |  | $ 5,000,000 | $ 10,000,000 | $ 15,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of variable rate basis |  |  |  |  |  | Under the 2006 Swap Agreement, the Company receives a three-month LIBOR rate and pays a fixed rate of interest of 5.63% plus an applicable margin. | Under the 2008 Swap Agreement, on a quarterly basis the Company received a three-month LIBOR rate and paid a fixed rate of interest of 3.265% plus the applicable margin. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed rate of interest (in hundredths) |  |  |  |  |  | 5.63% | 3.265% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate of effectiveness of interest rate swap agreement (in hundredths) |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial covenants |  |  |  |  |  |  | maximum consolidated leverage ratio of 3.5 to 1, and a minimum consolidated interest charge coverage ratio of 3 to 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum consolidated leverage ratio |  |  |  |  |  |  | 3.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum consolidated interest coverage ratio |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized loss on derivatives |  |  |  |  |  |  |  |  |  |  | 773,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forward Currency-Exchange Contracts [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum period over which entity manages its level of exposure of risk |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recognized gains |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 146,000 | 12,000 | 4,000 |  |  |  |  |  |  |  |
Derivatives in an Asset Position [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives in an asset position |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | [1] | 5,000 | [1] |  |  |  |  |  |  |  | 97,000 | [1] | 24,000 | [1] |  |  |  |
Notional amount, Derivative asset |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | [2] | 269,000 | [2] |  |  |  |  |  |  |  | 1,419,000 | [2] | 1,013,000 | [2] |  |  |  |
Derivatives in a Liability Position [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives in a liability position |  |  |  |  |  |  |  |  |  |  |  |  | 0 | [1] | (19,000) | [1] | (773,000) | [1] | (1,029,000) | [1] |  |  |  |  |  |  | (22,000) | [1] | (161,000) | [1] |  |  |  |  |  |  |  | (1,000) | [1] | (12,000) | [1]
Notional amount, Derivative liability |  |  |  |  |  |  |  |  |  |  |  |  | 0 | [2] | 5,000,000 | [2] | 6,375,000 | [2] | 6,875,000 | [2] |  |  |  |  |  |  | 1,340,000 | [2] | 3,180,000 | [2] |  |  |  |  |  |  |  | 288,000 | [2] | 815,000 | [2]
Accumulated Other Comprehensive Items, Net of Tax [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized loss, net of tax, at beginning of period |  |  |  | 1,046,000 |  |  |  |  |  |  | 939,000 |  |  |  |  |  |  |  |  |  | 107,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss reclassified to earnings |  |  |  | (485,000) | [3] |  |  |  |  |  | (383,000) | [3] |  |  |  |  |  |  |  |  | (102,000) | [3] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss recognized in OCI | 413,000 | 387,000 | (193,000) | 72,000 |  |  |  |  |  |  | 62,000 |  |  |  |  |  |  |  |  |  | 10,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized loss, net of tax, at end of period |  |  |  | 633,000 |  |  |  |  |  |  | 618,000 |  |  |  |  |  |  |  |  |  | 15,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net unrealized loss included in OCI expected to be reclassified to earnings over the next 12 months |  |  |  | $ 281,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | See Note 11 for the fair value measurements relating to these financial instruments.
[2] | The total notional amount is indicative of the level of the Company’s derivative activity during 2013 and 2012.
[3] | Included in interest expense for interest rate swap agreements and in revenues for forward currency-exchange contracts in the accompanying consolidated statement of income.

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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. + Details
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- Definition Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e681-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669686-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669646-108580 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7668309&loc=d3e80784-113994 + Details
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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7668309&loc=d3e80748-113994 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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