CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Mortgage loans receivable, loan loss reserve	$ 2,315	$ 2,190
Notes receivable, net of loan loss reserve	166	0
Straight-line rent receivable, allowance for doubtful accounts	$ 960	$ 833
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	60,000	60,000
Common stock, shares issued	39,221	37,548
Common stock, shares outstanding	39,221	37,548
Senior Unsecured Notes
Debt issue costs, net	$ 1,009	$ 1,095