Combined Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 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)	72,681,218	55,758,710
Common stock, outstanding shares (in shares)	71,586,170	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)	38,002,344	44,055,987
Common stock, outstanding shares (in shares)	38,002,344	44,055,987