Annual report pursuant to Section 13 and 15(d)

Segments (Details 1)

v2.4.0.6
Segments (Details 1) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 29, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Oct. 01, 2011
Jul. 02, 2011
Apr. 02, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Summarizes the Company's sales by geographic region                      
Sales $ 67,420 $ 68,899 $ 64,989 $ 65,138 $ 61,156 $ 56,404 $ 55,475 $ 55,128 $ 266,446 $ 228,163 $ 195,754
North America [Member]
                     
Summarizes the Company's sales by geographic region                      
Sales                 233,245 196,447 168,556
Europe [Member]
                     
Summarizes the Company's sales by geographic region                      
Sales                 16,188 16,238 11,294
Asia [Member]
                     
Summarizes the Company's sales by geographic region                      
Sales                 14,030 12,544 13,026
South America [Member]
                     
Summarizes the Company's sales by geographic region                      
Sales                 1,937 2,678 2,457
Other Continent [Member]
                     
Summarizes the Company's sales by geographic region                      
Sales                 $ 1,046 $ 256 $ 421