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Derivatives (Details) (USD $)
 3 Months Ended 9 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Sep. 28, 2013
Sep. 29, 2012
Sep. 28, 2013
Cash Flow Hedging [Member]
Dec. 29, 2012
Cash Flow Hedging [Member]
Sep. 28, 2013
2006 Swap Agreement [Member]
Sep. 28, 2013
Interest Rate Swap Agreements [Member]
Sep. 28, 2013
Interest Rate Swap Agreements [Member]
Cash Flow Hedging [Member]
Dec. 29, 2012
Interest Rate Swap Agreements [Member]
Cash Flow Hedging [Member]
Sep. 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]
Sep. 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]
Sep. 28, 2013
Forward Currency-Exchange Contracts [Member]
Sep. 28, 2013
Forward Currency-Exchange Contracts [Member]
Cash Flow Hedging [Member]
Dec. 29, 2012
Forward Currency-Exchange Contracts [Member]
Cash Flow Hedging [Member]
Sep. 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]
Sep. 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]
Sep. 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]
Sep. 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]
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               853,000                                  
Forward Currency-Exchange Contracts [Abstract]                                                  
Maximum period over which entity manages its level of exposure of risk                             12 months                    
Recognized gains (losses) 37,000 (14,000) 50,000 (39,000)                                          
Derivatives in an Asset Position [Abstract]                                                  
Derivatives in an asset position                                   0 [1] 5,000 [1]     37,000 [1] 24,000 [1]    
Notional amount, Derivative asset                                   0 [2] 269,000     1,463,000 [2] 1,013,000    
Derivatives in a Liability Position [Abstract]                                                  
Derivatives in a liability position                     0 [1] (19,000) [1] (853,000) [1] (1,029,000) [1]           (42,000) [1] (161,000) [1]     0 [1] (12,000) [1]
Notional amount, Derivative liability                     0 [2] 0 6,500,000 [2] 6,875,000           1,340,000 [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         431,000 [3]       329,000 [3]             102,000 [3]                  
Loss recognized in OCI (61,000) (93,000) (350,000) (83,000) (81,000)       (58,000)             (23,000)                  
Unrealized loss, net of tax, at end of period         (696,000) (1,046,000)     (668,000) (939,000)           (28,000) (107,000)                
Net unrealized loss included in OCI expected to be reclassified to earnings over the next 12 months $ 298,000                                                
[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 nine 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.