Consolidated Statements Of Equity (USD $) In Thousands, except Share data	Common Shares [Member]	Additional Paid-In Capital [Member]	Accumulated Dividends In Excess Of Net Income [Member]	Predecessor's Controlled Owners' Equity [Member]	Noncontrolling Interests - Unitholders In The Operating Partnership [Member]	Predecessor's Noncontrolling Interests - Owners In Consolidated Entities [Member]	Total
Balance at Dec. 31, 2010				$ 121,874		$ 33,247	$ 155,121
Net income (loss)			2,923	16,995	1,209	(2,458)	18,669
Distributions				(33,435)		(6,525)	(39,960)
Proceeds from sale of common stock, net	316	587,695					588,011
Proceeds from sale of common stock, net, shares	31,625,000
Cash paid to non-accredited investors						(6,075)	(6,075)
Issuance of restricted stock	6	(6)
Issuance of restricted stock, shares	630,663
Forfeiture of restricted stock, shares	(1,951)
Issuance of common shares and units for acquisition of properties	3	6,081			27,770		33,854
Issuance of common shares and units for acquisition of properties, shares	262,486
Proceeds from private placement					5,410		5,410
Notes receivable from affiliate settled in common units					(21,797)		(21,797)
Notes payable to affiliates settled in common units					828		828
Dividends declared and paid			(23,156)		(10,854)		(34,010)
Stock-based compensation		1,902					1,902
Stock-based compensation, shares
Distribution of investment in joint venture not acquired				(9,084)		(2,396)	(11,480)
Exchange of owners' equity for common stock and units	68	57,260		(96,350)	54,815	(15,793)
Exchange of owners' equity for common stock and units, shares	6,767,598
Balance at Sep. 30, 2011	$ 393	$ 652,932	$ (20,233)		$ 57,381		$ 690,473
Balance, shares at Sep. 30, 2011	39,283,796						39,283,796