CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
CONSOLIDATED BALANCE SHEETS
Mortgage loans receivable, loan loss reserve	$ 2,061	$ 1,673
Straight-line rent receivable, allowance for doubtful accounts	$ 775	$ 731
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	15,000	15,000
Preferred stock, shares issued	2,000	2,000
Preferred stock, shares outstanding	2,000	2,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	60,000	60,000
Common stock, shares issued	35,570	35,480
Common stock, shares outstanding	35,570	35,480