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Stock Buy Back Plans	12 Months Ended
	Dec. 31, 2011
Stock Buy Back Plans [Abstract]
Stock Buy Back Plans	NOTE 17. Stock Buy Back Plans On February 24, 2010, our Board of Directors authorized the purchase of up to $30.0 million of our Class A Common Stock. This authorization expired March 31, 2011. We purchased 784,197 shares under this authorization during the year ended December 31, 2010. No additional shares were repurchased before the authorization expired March 31, 2011. We purchased 43,247 shares for $1.5 million during the year ended December 31, 2011 related to employee withholding upon vesting of restricted stock.

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The entire disclosure for an entity's treasury stock, including the average cost per share, carrying basis for each class of treasury stock, description of share repurchase program authorized by an entity's board of directors, the number of shares repurchased, the cost of the shares repurchased, the remaining maximum dollar value of shares available for repurchase under the program, the treatment of the purchase price in excess of the current market value, number of shares held for each class of treasury stock, and other information necessary to a fair presentation.

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