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Derivatives (Details) (USD $)
 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
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.