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Derivatives (Details) (USD $) | 3 Months Ended | 6 Months Ended |  | 3 Months Ended | 6 Months Ended |  |  | 3 Months Ended | 6 Months Ended |  |  |  |  |  |  |  |
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Jun. 28, 2014 | Jun. 29, 2013 | Jun. 28, 2014 | Jun. 29, 2013 | Jun. 28, 2014 Cash Flow Hedging [Member] | Jun. 28, 2014 2006 Swap Agreement [Member] | Jun. 28, 2014 Interest Rate Swap Agreements [Member] | Jun. 28, 2014 Interest Rate Swap Agreements [Member] Cash Flow Hedging [Member] | Jun. 28, 2014 Interest Rate Swap Agreements [Member] Derivatives Designated as Hedging Instruments [Member] Other Long Term Liabilities [Member] | Dec. 28, 2013 Interest Rate Swap Agreements [Member] Derivatives Designated as Hedging Instruments [Member] Other Long Term Liabilities [Member] | Jun. 28, 2014 Forward Currency-Exchange Contracts [Member] | Jun. 28, 2014 Forward Currency-Exchange Contracts [Member] Cash Flow Hedging [Member] | Jun. 28, 2014 Forward Currency-Exchange Contracts [Member] Derivatives Designated as Hedging Instruments [Member] Other Current Liabilities [Member] | Dec. 28, 2013 Forward Currency-Exchange Contracts [Member] Derivatives Designated as Hedging Instruments [Member] Other Current Liabilities [Member] | Jun. 28, 2014 Forward Currency-Exchange Contracts [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] Other Long Term Liabilities [Member] | Jun. 28, 2014 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 Assets [Member] | Jun. 28, 2014 Forward Currency-Exchange Contracts [Member] Derivatives Not Designated as Hedging Instruments [Member] Other Current Liabilities [Member] | Dec. 28, 2013 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, and a minimum consolidated interest coverage ratio of 3 to 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum consolidated leverage ratio |  |  |  |  |  |  | 3.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum consolidated interest coverage ratio |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized loss on derivatives |  |  |  |  |  |  | $ 619,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forward Currency-Exchange Contracts [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum period over which entity manages its level of exposure of risk |  |  |  |  |  |  |  |  |  |  |  |  | 24 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recognized gains (losses) |  | 15,000 | 36,000 | 13,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives in an Asset Position [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives in an asset position |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | [1] | 97,000 | [1] |  |  |  |
Notional amount, Derivative asset |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | [2] | 1,419,000 |  |  |  |  |
Derivatives in a Liability Position [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives in a liability position |  |  |  |  |  |  |  |  | (619,000) | [1] | (773,000) | [1] |  |  | (31,000) | [1] | (22,000) | [1] | (384,000) | [1] | 0 | [1] |  |  |  |  | 0 | [1] | (1,000) | [1]
Notional amount, Derivative liability |  |  |  |  |  |  |  |  | 6,125,000 | [2] | 6,375,000 |  |  |  | 1,340,000 | [2] | 1,340,000 |  | 16,571,000 | [2] | 0 |  |  |  |  |  | 0 | [2] | 288,000 |
Accumulated Other Comprehensive Items, Net of Tax [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized loss, net of tax, at beginning of period |  |  |  |  | (633,000) |  |  | (618,000) |  |  |  |  |  | (15,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss reclassified to earnings |  |  |  |  | 349,000 |  |  | 108,000 |  |  |  |  |  | 241,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss recognized in OCI | 99,000 | (94,000) | 7,000 | (289,000) | (356,000) |  |  | (8,000) |  |  |  |  |  | (348,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized loss, net of tax, at end of period |  |  |  |  | (640,000) |  |  | (518,000) |  |  |  |  |  | (122,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net unrealized loss included in OCI expected to be reclassified to earnings over the next 12 months | $ 327,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[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 three months of 2014.

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