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Shareholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2016
Equity [Abstract]  
Summary of Outstanding Shares of Common Stock

The following table summarizes outstanding shares of common stock:

 

 

Year ended December 31

 

In thousands

2016

 

 

 

2015

 

 

 

2014

 

Shares outstanding at

   beginning of year

 

43,420

 

 

 

 

43,054

 

 

 

 

43,130

 

Shares repurchased

 

—

 

 

 

 

—

 

 

 

 

(464

)

Treasury shares issued

   for:

 

 

 

 

 

 

 

 

 

 

 

 

 

Restricted stock awards

 

108

 

 

 

 

206

 

 

 

 

162

 

401(k) plan

 

—

 

 

 

 

134

 

 

 

 

116

 

Employee stock options

   exercised

 

22

 

 

 

 

26

 

 

 

 

110

 

Shares outstanding at end

   of year

 

43,550

 

 

 

 

43,420

 

 

 

 

43,054