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Shareholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2015
Equity [Abstract]  
Summary of Outstanding Shares of Common Stock

The following table summarizes outstanding shares of common stock:

 

     Year ended December 31  

In thousands

      2015         2014        2013   

Shares outstanding at beginning of year

      43,054         43,130        42,784   

Shares repurchased

      –         (464 )      –   

Treasury shares issued for:

          

Restricted stock awards

      206         162        86   

401(k) plan

      134         116        123   

Employee stock options exercised

      26         110        137   

Shares outstanding at end of year

      43,420         43,054        43,130