Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Details)

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Summary of Significant Accounting Policies (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jul. 02, 2011
Jun. 30, 2012
Jul. 02, 2011
Schedule of basic and diluted earnings per common share        
Net income $ 11,247 $ 10,437 $ 21,870 $ 20,207
Weighted average basic shares outstanding 25,937 25,638 25,861 25,593
Basic net income per common share $ 0.43 $ 0.41 $ 0.85 $ 0.79
Effect of dilutive stock options 38 36 44 36
Weighted average diluted shares outstanding 25,975 25,674 25,905 25,629
Diluted net income per common share $ 0.43 $ 0.41 $ 0.84 $ 0.79