STOCKHOLDERS' EQUITY - Common Stock Narrative (Details) - $ / shares	Jun. 30, 2016	Dec. 31, 2015
Class A
Class of Stock [Line Items]
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, par value (in USD per share)	$ 0.0000001	$ 0.0000001
Common stock, shares outstanding (in shares)	118,365,688	31,717,133
Class B
Class of Stock [Line Items]
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, par value (in USD per share)	$ 0.0000001	$ 0.0000001
Common stock, shares outstanding (in shares)	222,597,682	303,232,312