CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Real estate investment properties, net	$ 678,041	$ 712,589
Mortgages and other notes payable	$ 146,251	$ 184,341
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	200,000,000	200,000,000
Preferred stock, shares unissued (in shares)	200,000,000	200,000,000
Excess shares, par value (in dollars per share)	$ 0.01	$ 0.01
Excess shares, shares authorized (in shares)	120,000,000	120,000,000
Excess shares, shares unissued (in shares)	120,000,000	120,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	349,084,000	349,084,000
Common stock, shares outstanding (in shares)	325,183,000	325,183,000
Variable interest entities
Real estate investment properties, net	$ 55,941	$ 58,832
Mortgages and other notes payable	$ 18,628	$ 19,503