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Basic and Diluted Net Income (Loss) Per Share (Details 2) (Class A common stock)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Stock awards
Antidilutive securities excluded from computation of earnings per share
Anti-dilutive securities excluded from computation of earnings per share	400,000	800,000
Performance based options
Antidilutive securities excluded from computation of earnings per share
Dilutive securities excluded from computation of earnings per share	7,322,000	7,806,000
Restricted Performance Units
Antidilutive securities excluded from computation of earnings per share
Dilutive securities excluded from computation of earnings per share	1,843,000	1,969,000
Long-Term Performance Based Plans
Antidilutive securities excluded from computation of earnings per share
Dilutive securities excluded from computation of earnings per share	9,165,000	9,775,000

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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