Condensed Consolidated Balance Sheets Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified			1 Months Ended	9 Months Ended		9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Aug. 31, 2014 Private Perpetual Preferred Units [Member]	Sep. 30, 2014 Common Class A [Member]	Dec. 31, 2013 Common Class A [Member]	Sep. 30, 2014 Common Class B [Member]	Dec. 31, 2013 Common Class B [Member]
Preferred Unit, Liquidation Preference			$ 16.62
Stock issued			1,609,813	2,556,000		110,000
Tenant and other receivables allowance	$ 2,555	$ 499
Deferred rent receivables allowance	$ 792	$ 216
Common stock, par value				$ 0.01	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized				400,000,000	400,000,000	50,000,000	50,000,000
Common stock, shares issued				97,040,753	94,484,023	1,232,123	1,122,130
Common stock, shares outstanding				97,035,359	94,484,023	1,232,123	1,122,130
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0