Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating Activities
Net income	$ 73,624	$ 52,149
Adjustments to reconcile net income to net cash provided by operating activities:
Income, including depreciation, from unconsolidated real estate funds	(5,564)	(3,548)
Gain from insurance recoveries for damage to real estate	0	(82)
Gains on sales of investments in real estate	(14,327)	0
Depreciation and amortization	181,947	153,309
Net accretion of acquired lease intangibles	(13,415)	(15,806)
Straight-line rent	(10,915)	(4,463)
Increase in the allowance for doubtful accounts	1,190	151
Amortization of deferred loan costs	5,470	5,136
Amortization of stock-based compensation	7,077	5,973
Operating distributions from unconsolidated real estate funds	1,356	762
Change in working capital components:
Tenant receivables	(1,451)	(48)
Interest payable, accounts payable and deferred revenue	37,389	14,589
Security deposits	7,461	613
Other assets	(4,179)	(3,084)
Net cash provided by operating activities	265,663	205,651
Investing Activities
Capital expenditures for improvements to real estate	(57,771)	(52,833)
Capital expenditures for developments	(18,635)	(2,636)
Insurance recoveries for damage to real estate	0	82
Property acquisitions	(1,619,760)	(89,906)
Proceeds from sales of investments in real estate, net	348,203	0
Proceeds from repayment of note receivable	0	1,000
Loan payments received from related parties	763	906
Contributions to unconsolidated real estate funds	0	(24)
Capital distributions from unconsolidated real estate funds	21,973	5,711
Net cash used in investing activities	(1,325,227)	(137,700)
Financing Activities
Proceeds from borrowings	1,589,500	1,099,400
Repayment of borrowings	(786,156)	(1,060,579)
Loan cost payments	(18,239)	(8,164)
Contributions from noncontrolling interests in consolidated joint ventures	459,750	0
Distributions paid to noncontrolling interests in our Operating Partnership	(26,185)	(17,549)
Cash dividends paid to common stockholders	(97,575)	(91,775)
Proceeds from exercise of stock options	0	1,823
Taxes paid on exercise of stock options	(53,467)	0
Repurchase of OP Units	(826)	0
Proceeds from issuance of common stock, net	49,379	0
Net cash provided by financing activities	1,116,181	(76,844)
Increase (decrease) in cash and cash equivalents	56,617	(8,893)
Cash and cash equivalents at beginning of period	101,798	18,823
Cash and cash equivalents at end of period	158,415	9,930
SUPPLEMENTAL CASH FLOWS INFORMATION
Cash paid for interest, net of capitalized interest of $793 and $701 for the nine months ended September 30, 2016 and 2015, respectively	104,205	96,617
Accrual (increase)/decrease for capital expenditures for improvements to real estate and developments	(68)	1,427
Capitalized stock-based compensation for improvements to real estate and developments	683	610
Write-off of fully depreciated and amortized tenant improvements and lease intangibles	13,746	10,751
Write-off of fully amortized acquired lease intangible assets	1,241	36
Write-off of fully accreted acquired lease intangible liabilities	11,142	22,496
Settlement of note receivable in exchange for land and building acquired	0	26,500
Issuance of OP Units in exchange for land and building acquired	0	1,000
Application of deposit to purchase price of property	75,000	2,500
Loss from market value adjustments	(37,927)	(21,975)
Dividends declared	98,501	92,087
Common stock issued in exchange for OP Units	17,733	18,101
Fund X [Member]
SUPPLEMENTAL CASH FLOWS INFORMATION
Loss from market value adjustments	$ (814)	$ (2,483)