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CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical)	Jun. 30, 2012	Dec. 31, 2011
Common Class A [Member]
Common shares issued (in shares)	2	2
Common shares outstanding (in shares)	2	2
Nonvoting Common Stock [Member]
Common shares issued (in shares)	101,577,507	98,509,387
Common shares outstanding (in shares)	101,577,507	98,509,387

Total number of shares of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares represent the ownership interest of the common shareholders. Shares outstanding equals shares issued minus shares held in treasury and other adjustments, if any.

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