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Weighted Average Common Shares (Tables)
9 Months Ended
Sep. 30, 2012
Weighted Average Common Shares [Abstract]  
Weighted average common shares outstanding
                                 
    Three Months Ended
September 30,
    Nine Months Ended
September 30,
 
    2012     2011     2012     2011  

Weighted average common shares outstanding-Basic

    21,835       21,653       21,826       21,646  

Dilutive effect of common shares issuable upon exercise of stock options, RSUs and SARs

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Weighted average common shares outstanding assuming dilution

    21,835       21,653       21,826       21,646