CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Due from affiliate	$ 0	$ 7
Due to affiliates	$ 455	$ 99
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	167,066,364	162,529,811
Common stock, shares outstanding	167,066,364	162,529,811
Preferred stock
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	40,866,376	40,866,376
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Convertible Preferred Stock
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	9,133,624	9,133,624
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0