. we continued to repurchase shares of our common stock pursuant to our 2011 buyback subsequent to december 31 , 2012 . between january 1 , 2013 and january 21 , 2013 , we repurchased an additional 15790 shares of our common stock for an aggregate of $ 1.2 million , including commissions and fees , pursuant to the 2011 buyback . as a result , as of january 21 , 2013 , we had repurchased a total of approximately 4.3 million shares of our common stock under the 2011 buyback for an aggregate of $ 245