Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 72,587	$ 212,005
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of real estate assets and leasing costs	120,734	102,127
Depreciation of non-real estate furniture, fixtures and equipment	2,436	1,659
Increase in provision for bad debts (Note 3)	1,707	0
Non-cash amortization of share-based compensation awards	8,966	10,034
Non-cash amortization of deferred financing costs and debt discounts and premiums	1,469	1,306
Non-cash amortization of net below market rents	(3,603)	(3,243)
Gains on sales of depreciable operating properties (Note 2)	(2,257)	(145,990)
Loss on sale of land	0	295
Non-cash amortization of deferred revenue related to tenant-funded tenant improvements	(8,243)	(6,100)
Straight-line rents	(15,537)	(18,537)
Net change in other operating assets	(7,418)	(6,071)
Net change in other operating liabilities	7,575	(9,856)
Net cash provided by operating activities	178,416	137,629
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for development properties and undeveloped land	(161,045)	(162,122)
Expenditures for operating properties and other capital assets	(40,738)	(65,543)
Expenditures for acquisition of operating properties	0	(55,415)
Expenditures for acquisition of undeveloped land	0	(33,513)
Net proceeds received from dispositions (Note 2)	11,865	276,622
(Increase) decrease in acquisition-related deposits	(26,100)	1,902
Increase in note receivable	0	(1,000)
Net cash used in investing activities	(216,018)	(39,069)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of common stock (Note 7)	308,832	0
Redemption of Series G preferred stock	(100,000)	0
Proceeds from the issuance of unsecured debt (Note 5)	250,000	0
Borrowings on unsecured revolving credit facility	0	270,000
Repayments on unsecured revolving credit facility	0	(50,000)
Principal payments on secured debt	(4,213)	(4,808)
Financing costs	(2,191)	(679)
Repurchase of common stock and restricted stock units	(11,642)	(5,883)
Proceeds from exercise of stock options	12,051	937
Contributions from noncontrolling interests in consolidated property partnerships	250	0
Distributions to noncontrolling interests in consolidated property partnerships	(8,651)	(281)
Dividends and distributions paid to common stockholders and common unitholders	(255,292)	(65,935)
Dividends and distributions paid to preferred stockholders and preferred unitholders	(5,806)	(6,625)
Net cash provided by financing activities	183,338	136,726
Net increase (decrease) in cash and cash equivalents and restricted cash	145,736	235,286
Cash and cash equivalents and restricted cash, beginning of period	250,129	57,204
Cash and cash equivalents and restricted cash, end of period	$ 395,865	$ 292,490