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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY AND NONCONTROLLING INTEREST (Parenthetical)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Common Class A [Member]
Conversion Of Stock, Shares Converted	(12,000)	(76,486)
Stock Repurchased During Period, Shares		54,566
Common Class D [Member]
Conversion Of Stock, Shares Converted	12,000	76,486
Stock Repurchased During Period, Shares		4,245,567

The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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