CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Operating activities:
Net income (loss)	$ 12,431	$ (10,982)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Real estate-related depreciation and amortization	106,728	84,909
Equity in loss of unconsolidated joint ventures	39	2,805
Gain on disposition of real estate properties	(24,471)	0
Gain on acquisition of joint venture	0	(26,481)
Incentive fee from acquisition of joint venture	0	(1,985)
Straight-line rent and amortization of above- and below-market leases	(9,715)	(8,562)
Other	1,692	1,665
Changes in operating assets and liabilities:
Tenant receivables and other assets	(1,449)	(3,809)
Accounts payable, accrued expenses and other liabilities	(4,129)	17,167
Net cash provided by operating activities	81,126	54,727
Investing activities:
Real estate acquisitions	(116,826)	(815,634)
Acquisition of joint venture	0	(126,010)
Acquisition deposits	(17,220)	(28,367)
Capital expenditures and development activities	(84,697)	(55,098)
Investment in unconsolidated joint ventures	(181)	(19,802)
Distributions from unconsolidated joint ventures	0	3,754
Proceeds from disposition of real estate properties	125,310	0
Other	0	(247)
Net cash used in investing activities	(93,614)	(1,041,404)
Financing activities:
Proceeds from issuance of mortgage notes	17,500	0
Repayments of mortgage notes	(4,964)	(9,975)
Proceeds from issuance of term loan	0	300,000
Proceeds from lines of credit	165,000	705,000
Repayments of lines of credit	(107,000)	(610,000)
Proceeds from issuance of common stock	0	721,768
Offering costs for issuance of common stock	(908)	(69,781)
Distributions paid to common stockholders	(48,941)	(35,793)
Redemptions of common stock	(14,814)	(9,592)
Other	(582)	(1,849)
Net cash provided by financing activities	5,291	989,778
Net (decrease) increase in cash and cash equivalents	(7,197)	3,101
Cash and cash equivalents, at beginning of period	18,358	24,550
Cash and cash equivalents, at end of period	11,161	27,651
Supplemental disclosure of cash flow information:
Distributions payable	32,896	31,725
Distributions reinvested in common stock	48,595	31,853
Debt assumed on real estate and joint venture acquisitions	0	241,280
Acquired investment in unconsolidated joint venture	$ 0	$ 104,246