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REPURCHASES OF COMMON STOCK
3 Months Ended
Mar. 31, 2016
REPURCHASES OF COMMON STOCK [Abstract]  
REPURCHASES OF COMMON STOCK
5. REPURCHASES OF COMMON STOCK

During the three-month periods ended March 31, 2016 and 2015, the Company repurchased 0.6 million and 0.5 million shares of its Class A common stock under its open market stock repurchase plans for $20.0 million and $26.3 million, respectively.  As of March 31, 2016, $427.0 million was available for repurchases under the Company's current open market stock repurchase plan.