CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Statement Of Financial Position [Abstract]
Allowance on deferred rent receivable	$ 6,359	$ 4,775
Allowance on notes and mortgages receivable	133	0
Allowance on accounts receivable	$ 3,900	$ 3,248
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	33,416,873	33,397,260