Stock Repurchase

6 Months Ended

Jun. 30, 2011

Stock Repurchases [Abstract]

Stock Repurchase

Stock repurchase

On April 19, 2011, ACI purchased 26,150,000 shares of its common stock held by the Estate of Craig H. Neilsen (the “Estate”) at $17.50 per share, for a total of $457.6 million. The purchase was made pursuant to a definitive Stock Purchase Agreement (the “Purchase Agreement”) entered into by ACI and the Estate on March 25, 2011, following the execution of a binding letter agreement entered into on February 27, 2011. The shares purchased represented approximately 45% of ACI's outstanding shares and 83% of the Estate's holdings in the Company at the time of the purchase.