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Stockholders' Equity
 12 Months Ended
Dec. 31, 2012
Stockholders' Equity.  
Stockholders' Equity

13. Stockholders' Equity

        Changes in outstanding shares of common stock for the past three years were as follows:

(shares in thousands)
   2012   2011   2010  

Beginning balances

     20,405     20,007     19,807  

Stock issuances

                    

Stock option exercises

     245     332     146  

Restricted stock activity

     95     64     54  

Stock issued in lieu of director retainer

     2     2     —  
               

Ending balances

     20,747     20,405     20,007  
               

        On August 1, 2012, the Company's Board of Directors authorized the repurchase of up to $20.0 million of the Company's common stock, and the Company subsequently established a Rule 10b5-1 plan to facilitate this repurchase. The share repurchase program was authorized through August 9, 2013. No shares have been repurchased under this program.

        The Company has not declared or paid any cash or non-cash dividends on any class of stock during the years ended December 31, 2012, 2011 and 2010.