Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating Activities
Net income	$ 40,749	$ 30,237
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	50,421	46,995
Loss on sale of real estate	0	340
Amortization of loan fees and costs	2,561	2,386
Amortization of debt premiums/discounts	205	115
Amortization of acquired above and below market leases	(816)	(830)
Deferred rent	(11,882)	(6,198)
Stock compensation expense	3,228	3,349
Investment gains	(4,040)	(446)
Investment losses	1,694	386
Changes in operating assets and liabilities:
Restricted cash	0	1,506
Tenant receivables	(690)	(818)
Deferred leasing costs	(7,572)	(11,757)
Other assets	(17,315)	(7,302)
Accounts payable, accrued expenses, and tenant security deposits	16,716	(10,722)
Net cash (used in) provided by operating activities	73,259	47,241
Investing Activities
Proceeds from sale of properties	0	80,203
Additions to properties	(111,587)	(139,245)
Purchase of properties	(42,338)	0
Change in restricted cash related to construction projects	(140)	(17)
Contributions to unconsolidated real estate entity	(747)	(2,074)
Additions to investments	(11,905)	(10,363)
Proceeds from investments	3,998	1,972
Net cash (used in) provided by investing activities	(162,719)	(69,524)
Financing Activities
Borrowings from secured notes payable	51,030	17,215
Repayments of borrowings from secured notes payable	(210,844)	(2,749)
Principal borrowings from unsecured senior line of credit	360,000	179,000
Repayments of borrowings from unsecured senior line of credit	(58,000)	(191,000)
Change in restricted cash related to financings	1,059	8,656
Deferred financing costs paid	(8)	(46)
Dividends paid on common stock	(48,714)	(35,687)
Dividends paid on preferred stock	(6,471)	(6,471)
Contributions by noncontrolling interests	19,410	0
Distributions to noncontrolling interests	(988)	(427)
Net cash provided by (used in) financing activities	106,474	(31,509)
Effect of foreign exchange rate changes on cash and cash equivalents	260	(178)
Net increase (decrease) in cash and cash equivalents	17,274	(53,970)
Cash and cash equivalents at beginning of period	57,696	140,971
Cash and cash equivalents at end of period	74,970	87,001
Supplemental Disclosure of Cash Flow Information
Cash paid during the period for interest, net of interest capitalized	6,093	9,964
Non-Cash Investing Activities
Note receivable from sale of real estate	0	38,820
Change in accrued capital expenditures	(6,028)	(37,045)
Assumption of secured notes payable in connection with purchase of properties	$ (48,329)	$ 0