CONSOLIDATED STATEMENT OF EQUITY (USD $) In Thousands, except Share data	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Distributions in Excess of Net Earnings [Member]	Non-controlling interests [Member]
Balance at Dec. 31, 2009	$ 8,007,286	$ 350,000	$ 2,117	$ 8,527,492	$ 42,298	$ (934,583)	$ 19,962
Balance, Shares at Dec. 31, 2009			211,666,000
Consolidated net earnings (loss)	(1,270,453)					(1,270,496)	43
Issuances of stock in equity offering, net of issuance costs	1,087,284		411	1,086,873
Issuances of stock in equity offering, net of issuance costs, Shares			41,069,000
Effect of common stock plans	56,612		17	56,595
Effect of common stock plans, Shares	617,000		1,725,000
Noncontrolling interests, issuances (conversions), net				600			(600)
Noncontrolling interests, issuances (conversions), net, Shares			22,000
Foreign currency translation losses, net	(45,248)				(42,315)		(2,933)
Unrealized gain (loss) and amortization on derivative contracts, net	(3,143)				(3,143)
Distributions and allocations	(311,983)					(310,643)	(1,340)
Balance at Dec. 31, 2010	7,520,355	350,000	2,545	9,671,560	(3,160)	(2,515,722)	15,132
Balance, Shares at Dec. 31, 2010			254,482,000
Consolidated net earnings (loss)	(157,938)					(153,414)	(4,524)
Merger and PEPR Acquisition	6,537,376	232,200	1,696	5,552,412			751,068
Merger and PEPR Acquisition, Shares			169,626,000
Issuances of stock in equity offering, net of issuance costs	1,112,132		345	1,111,787
Issuances of stock in equity offering, net of issuance costs, Shares			34,500,000
Effect of common stock plans	2,398		8	2,390
Effect of common stock plans, Shares	793,000		793,000
Capital contributions, net	94,020						94,020
Foreign currency translation losses, net	(192,591)				(170,995)		(21,596)
Unrealized gain (loss) and amortization on derivative contracts, net	(8,166)				(8,166)
Distributions and allocations	(452,112)			11,179		(423,026)	(40,265)
Balance at Dec. 31, 2011	14,455,474	582,200	4,594	16,349,328	(182,321)	(3,092,162)	793,835
Balance, Shares at Dec. 31, 2011	459,401,000		459,401,000
Consolidated net earnings (loss)	(30,472)					(39,720)	9,248
Adjustment to the Merger purchase price allocation	10,163						10,163
Effect of common stock plans	72,932		23	72,909
Effect of common stock plans, Shares	2,258,000		2,258,000
Capital contributions, net	74,447						74,447
Noncontrolling interests, issuances (conversions), net			1	2,380			(2,381)
Noncontrolling interests, issuances (conversions), net, Shares			111,000
Purchase of noncontrolling interests	(142,064)			(13,998)			(128,066)
Foreign currency translation losses, net	(79,014)				(69,155)		(9,859)
Unrealized gain (loss) and amortization on derivative contracts, net	17,986				17,913		73
Distributions and allocations	(606,116)			1,236		(564,211)	(43,141)
Balance at Dec. 31, 2012	$ 13,773,336	$ 582,200	$ 4,618	$ 16,411,855	$ (233,563)	$ (3,696,093)	$ 704,319
Balance, Shares at Dec. 31, 2012	461,770,000		461,770,000