Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 2,021	$ 586
Convertible preferred stock, par value (usd per share)	$ 0.0001	$ 0.0001
Convertible preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Convertible preferred stock, shares issued (in shares)	0	0
Convertible preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (usd per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	161,643,000	152,860,000
Common stock, shares outstanding (in shares)	161,643,000	152,860,000
Treasury stock (shares)	3,333,000	0