Income (Loss) Per Share of Class A and Class B Common Stock Schedule of Equity Antidilutive Securities (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities, Amount	110,193,147	46,997,097	76,475,127	44,196,030
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities, Amount	1,241,917	1,986,295	1,353,100	2,060,915
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities, Amount	35,796,752	43,168,136	36,992,033	40,612,765
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities, Amount	1,219,018	1,005,543	1,456,165	793,170
Employee Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities, Amount	1,219,133	837,123	1,315,666	729,180
Convertible Debt [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities, Amount	44,261,298	0	22,130,649	0
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities, Amount	26,455,029	0	13,227,514	0
Performance Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock Granted, Value, Share-based Compensation, Gross	260,709		389,046