Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash Flows from Operating Activities:
Net income	$ 90,452	$ 49,229
Operating distributions received from unconsolidated joint ventures	389	368
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	63,338	72,271
Amortization of debt issuance costs	842	866
Loss on settlement of forward starting interest rate swaps	0	(1,284)
Other amortization	34,912	29,890
Impairment loss on real estate assets	8,308	5,354
Stock compensation expense	5,653	4,071
Equity in income of unconsolidated joint ventures	(226)	(283)
Gain on sale of real estate assets	(78,967)	(36,684)
Changes in assets and liabilities:
Increase in tenant and straight-line rent receivables, net	(8,795)	(16,447)
Decrease/(increase) in restricted cash and escrows	4,230	(266)
Increase in prepaid expenses and other assets	(4,745)	(5,071)
Decrease in accounts payable and accrued expenses	(9,785)	(9,762)
(Decrease)/increase in deferred income	(2,862)	4,235
Net cash provided by operating activities	102,744	96,487
Cash Flows from Investing Activities:
Acquisition of real estate assets and related intangibles	(10,000)	(45,185)
Capitalized expenditures, net of accruals	(54,422)	(62,587)
Redemption of noncontrolling interest in unconsolidated variable interest entity	0	(4,000)
Net sales proceeds from wholly-owned properties	201,690	87,925
Deferred lease costs paid	(6,266)	(10,678)
Net cash provided by/(used in) investing activities	131,002	(34,525)
Cash Flows from Financing Activities:
Debt issuance costs paid	(138)	(830)
Proceeds from debt	211,000	1,054,857
Repayments of debt	(357,597)	(1,012,576)
Costs of issuance of common stock	(42)	(326)
Shares withheld to pay tax obligations related to employee stock compensation	(2,283)	(1,654)
Repurchases of common stock as part of announced plan	(7,943)	(39,914)
Dividends paid and discount on dividend reinvestments	(61,075)	(64,828)
Net cash used in financing activities	(218,078)	(65,271)
Net increase/(decrease) in cash and cash equivalents	15,668	(3,309)
Cash and cash equivalents, beginning of period	5,441	12,306
Cash and cash equivalents, end of period	21,109	8,997
Supplemental Disclosures of Significant Noncash Investing and Financing Activities:
Change in accrued share repurchases as part of an announced plan	0	6,345
Accrued capital expenditures and deferred lease costs	25,146	15,930
Accrued deferred financing costs	$ 0	$ 75