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Derivatives (Details) (USD $) | 3 Months Ended | 6 Months Ended | 3 Months Ended |  |  | 3 Months Ended |  |  |  |  |  | 3 Months Ended |  |  |  |  |  |  |  |  |
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Jun. 29, 2013 | Jun. 30, 2012 | Jun. 29, 2013 | Jun. 30, 2012 | Jun. 29, 2013 Cash Flow Hedging [Member] | Dec. 29, 2012 Cash Flow Hedging [Member] | Jun. 29, 2013 2006 Swap Agreement [Member] | Jun. 29, 2013 Interest Rate Swap Agreements [Member] | Jun. 29, 2013 Interest Rate Swap Agreements [Member] Cash Flow Hedging [Member] | Dec. 29, 2012 Interest Rate Swap Agreements [Member] Cash Flow Hedging [Member] | Jun. 29, 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] | Jun. 29, 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] | Jun. 29, 2013 Forward Currency-Exchange Contracts [Member] | Jun. 29, 2013 Forward Currency-Exchange Contracts [Member] Cash Flow Hedging [Member] | Dec. 29, 2012 Forward Currency-Exchange Contracts [Member] Cash Flow Hedging [Member] | Jun. 29, 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] | Jun. 29, 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] | Jun. 29, 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] | Jun. 29, 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]
Interest Rate Swaps [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed rate of interest (in hundredths) |  |  |  |  |  |  |  | 5.63% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate of effectiveness of interest rate swap agreement (in hundredths) |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial covenants |  |  |  |  |  |  |  |  | maximum consolidated leverage ratio of 3.5 to 1, maximum annual capital expenditures of $25,000,000, and a minimum consolidated interest coverage ratio of 3.5 to 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum capital expenditures |  |  |  |  |  |  |  |  | $ 25,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum consolidated leverage ratio |  |  |  |  |  |  |  |  | 3.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum consolidated interest coverage ratio |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized loss on derivatives |  |  |  |  |  |  |  |  | 826,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forward Currency-Exchange Contracts [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum period over which entity manages its level of exposure of risk |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recognized gains (losses) | 15,000 | (23,000) | 13,000 | (25,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives in an Asset Position [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives in an asset position |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | [1] | 5,000 | [1] |  |  |  |  | 15,000 | [1] | 24,000 | [1] |  |  |  |
Notional amount, Derivative asset |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | [2] | 269,000 |  |  |  |  |  | 962,000 | [2] | 1,013,000 |  |  |  |  |
Derivatives in a Liability Position [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives in a liability position |  |  |  |  |  |  |  |  |  |  |  |  | 0 | [1] | (19,000) | [1] | (826,000) | [1] | (1,029,000) | [1] |  |  |  |  |  |  |  |  | (160,000) | [1] | (161,000) | [1] |  |  |  |  | 0 | [1] | (12,000) | [1]
Notional amount, Derivative liability |  |  |  |  |  |  |  |  |  |  |  |  | 0 | [2] | 0 |  | 6,625,000 | [2] | 6,875,000 |  |  |  |  |  |  |  |  |  | 2,629,000 | [2] | 3,180,000 |  |  |  |  |  | 0 | [2] | 815,000 |
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 |  |  |  |  | 326,000 | [3] |  |  |  | 271,000 | [3] |  |  |  |  |  |  |  |  |  |  | 55,000 | [3] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(Gain) Loss recognized in OCI | (94,000) | 174,000 | (289,000) | 10,000 | (37,000) |  |  |  |  | 17,000 |  |  |  |  |  |  |  |  |  |  |  | (54,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized loss, net of tax, at end of period |  |  |  |  | (757,000) |  | (1,046,000) |  |  | (651,000) |  | (939,000) |  |  |  |  |  |  |  |  |  | (106,000) |  | (107,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net unrealized loss included in OCI expected to be reclassified to earnings over the next 12 months | $ 408,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | See Note 11 for the fair value measurements related to these financial instruments.
[2] | The total notional amount is indicative of the level of the Company’s derivative activity during the first six months of 2013.
[3] | Included in interest expense and provision for income taxes for interest rate swap agreements and in revenues for forward currency-exchange contracts in the accompanying condensed consolidated statement of income.

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- Definition Net of tax amount, before reclassification adjustments, of the change in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Also includes an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss). + References Reference 1: 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 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(3) -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6441202&loc=d3e80720-113993 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 24 -Subparagraph b -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 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 17, 20 -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 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 121 -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 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 46 -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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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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