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REPURCHASES OF COMMON STOCK	6 Months Ended
	Jun. 30, 2018
REPURCHASES OF COMMON STOCK [Abstract]
REPURCHASES OF COMMON STOCK	5. REPURCHASES OF COMMON STOCK During the three-month periods ended June 30, 2018 and 2017, the Company repurchased 0.2 million and 0.3 million shares of its Class A common stock under its open market stock repurchase plan for $18.4 million and $15.3 million, respectively.  During the six-month periods ended June 30, 2018 and June 30, 2017, the Company repurchased 0.5 million and 0.4 million shares of its Class A common stock under its open market repurchase plans for $35.8 million and $22.1 million, respectively. As of June 30, 2018, $92.2 million was available for repurchases under the Company's open market stock repurchase plan.  In July 2018, the previous stock repurchase plan was terminated and replaced by a new repurchase plan with an initial authorization amount of $500 million.

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The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-URI http://asc.fasb.org/topic&trid=2208762

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