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Debt (Tables)
3 Months Ended
Jul. 01, 2012
Debt [Abstract]  
Long-term debt
                 

($ in thousands)

  July 1,
2012
    December 31,
2011
 

Revolving credit agreement, weighted-average interest rate of 1.8% (2012), and 1.9% (2011) due in 2017 and 2015, respectively

  $ 97,000     $ 74,400