Combined Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2016	Dec. 31, 2015
Treasury stock, shares (in shares)	1,095,048	548,861
Class A common stock
Common stock, par value per share (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized shares (in shares)	600,000,000	600,000,000
Common stock, issued shares (in shares)	64,237,833	55,758,710
Common stock, outstanding shares (in shares)	63,142,785	55,209,849
Class B common stock
Common stock, par value per share (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized shares (in shares)	100,000,000	100,000,000
Common stock, issued shares (in shares)	46,445,729	44,055,987
Common stock, outstanding shares (in shares)	46,445,729	44,055,987