Business Divestiture and Discontinued Operations (Details 1) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jul. 02, 2011
Jun. 30, 2012
Jul. 02, 2011
Financial results of our discontinued operations        
Revenues       $ 6
Total operating expenses credits (168) (447) (151) (548)
Net gains on business divestitures 3 465 19,862 2,120
Income before income taxes 171 912 20,013 2,674
Net income from discontinued operations $ 117 $ 579 $ 18,553 $ 1,698