Investments in Partially Owned Entities (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
Investments In Partially Owned Entities (Textuals) [Abstract]
Joint Venture Partner Ownership Percentage	80.00%
Equity Method Investment, Ownership Percentage	20.00%
Debt Instrument, Maturity Date	May 01, 2061
Preferred Interests	$ 65,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	148,500,000
Investment in Joint Venture	311,597,290
Number of Joint Ventures	2
Partners Payments To Acquire Equity Method Investments	40,100,000
Partially Owned Property Balance Sheet Schedule
Partially Owned Consolidated Properties	20
Partially Owned Unconsolidated Properties	4
Partially Owned Consolidated Units	4,020
Partially Owned Unconsolidated Units	1,669
ASSETS
Real Estate Investment Property, at Cost	27,065,130,000		26,800,948,000
Real Estate Investment Property, Accumulated Depreciation	(4,992,877,000)		(4,807,709,000)
Investment in real estate, net	22,072,253,000		21,993,239,000
Cash and Cash Equivalents, at Carrying Value	37,209,000	56,087,000	53,534,000	612,590,000
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	205,068,000		178,526,000
Restricted Cash and Cash Equivalents	91,081,000		103,567,000
Deferred Finance Costs, Net	55,754,000		58,486,000
Other Assets	384,271,000		404,557,000
Total assets	22,889,631,000		22,834,545,000
LIABILITIES AND EQUITY
Secured Debt	5,167,626,000		5,174,166,000
Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable	161,838,000		118,791,000
Interest Payable	78,140,000		78,309,000
Other Liabilities	321,043,000		347,748,000
Security Deposit Liability	72,735,000		71,592,000
Total liabilities	11,764,797,000		11,626,205,000
Noncontrolling Interests Partially Owned Properties	127,658,000		126,583,000
Total liabilities and equity	22,889,631,000		22,834,545,000
Partially Owned Property Income Statement Schedule
Operating revenue	633,442,000	504,722,000
Depreciation	185,167,000	196,222,000
General and Administrative Expense	17,576,000	16,495,000
Operating Income	199,252,000	104,246,000
Interest and Other Income	605,000	320,000
Interest:
Interest Expense, Debt	113,049,000	194,467,000
Amortization of Financing Costs	2,792,000	6,948,000
Income (loss) before income and other taxes, (loss) from investments in unconsolidated entities, net (loss) on sales of land parcels and discontinued operations	83,359,000	(118,568,000)
Income and other tax (expense) benefit	(222,000)	(405,000)
(Loss) from investments in unconsolidated entities	(1,409,000)	(46,366,000)
Net income	82,732,000	1,061,034,000
Consolidated Development Projects Held for and or Under Development [Member]
Partially Owned Property Balance Sheet Schedule
Partially Owned Consolidated Properties	0
Partially Owned Consolidated Units	0
ASSETS
Real Estate Investment Property, at Cost	310,147,000
Real Estate Investment Property, Accumulated Depreciation	0
Investment in real estate, net	310,147,000
Cash and Cash Equivalents, at Carrying Value	4,226,000
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0
Restricted Cash and Cash Equivalents	42,045,000
Deferred Finance Costs, Net	0
Other Assets	5,670,000
Total assets	362,088,000
LIABILITIES AND EQUITY
Secured Debt	0
Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable	17,438,000
Interest Payable	0
Other Liabilities	120,000
Security Deposit Liability	0
Total liabilities	17,558,000
Noncontrolling Interests Partially Owned Properties	117,689,000
Parent Equity Interest	226,841,000
Total Equity Interest	344,530,000
Total liabilities and equity	362,088,000
Partially Owned Property Income Statement Schedule
Operating revenue	0
Operating Expenses	77,000
Gross Profit	(77,000)
Depreciation	0
General and Administrative Expense	(9,000)
Operating Income	(68,000)
Interest and Other Income	0
Other Nonoperating Income (Expense)	(42,000)
Interest:
Interest Expense, Debt	0
Amortization of Financing Costs	0
Income (loss) before income and other taxes, (loss) from investments in unconsolidated entities, net (loss) on sales of land parcels and discontinued operations	(110,000)
Income and other tax (expense) benefit	0
(Loss) from investments in unconsolidated entities	0
Net income	(110,000)
Consolidated Completed, Not Stabilized [Member]
Partially Owned Property Balance Sheet Schedule
Partially Owned Consolidated Properties	1
Partially Owned Consolidated Units	268
ASSETS
Real Estate Investment Property, at Cost	48,319,000
Real Estate Investment Property, Accumulated Depreciation	0
Investment in real estate, net	48,319,000
Cash and Cash Equivalents, at Carrying Value	698,000
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0
Restricted Cash and Cash Equivalents	32,000
Deferred Finance Costs, Net	0
Other Assets	2,000
Total assets	49,051,000
LIABILITIES AND EQUITY
Secured Debt	0
Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable	1,413,000
Interest Payable	0
Other Liabilities	49,000
Security Deposit Liability	21,000
Total liabilities	1,483,000
Noncontrolling Interests Partially Owned Properties	1,244,000
Parent Equity Interest	46,324,000
Total Equity Interest	47,568,000
Total liabilities and equity	49,051,000
Partially Owned Property Income Statement Schedule
Operating revenue	468,000
Operating Expenses	204,000
Gross Profit	264,000
Depreciation	0
General and Administrative Expense	116,000
Operating Income	148,000
Interest and Other Income	0
Other Nonoperating Income (Expense)	0
Interest:
Interest Expense, Debt	0
Amortization of Financing Costs	0
Income (loss) before income and other taxes, (loss) from investments in unconsolidated entities, net (loss) on sales of land parcels and discontinued operations	148,000
Income and other tax (expense) benefit	0
(Loss) from investments in unconsolidated entities	0
Net income	148,000
Consolidated Operating [Domain]
Partially Owned Property Balance Sheet Schedule
Partially Owned Consolidated Properties	19
Partially Owned Consolidated Units	3,752
ASSETS
Real Estate Investment Property, at Cost	674,916,000
Real Estate Investment Property, Accumulated Depreciation	(178,165,000)
Investment in real estate, net	496,751,000
Cash and Cash Equivalents, at Carrying Value	11,611,000
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	53,844,000
Restricted Cash and Cash Equivalents	220,000
Deferred Finance Costs, Net	2,407,000
Other Assets	26,641,000
Total assets	591,474,000
LIABILITIES AND EQUITY
Secured Debt	360,217,000
Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable	2,806,000
Interest Payable	1,283,000
Other Liabilities	1,114,000
Security Deposit Liability	1,839,000
Total liabilities	367,259,000
Noncontrolling Interests Partially Owned Properties	8,725,000
Parent Equity Interest	215,490,000
Total Equity Interest	224,215,000
Total liabilities and equity	591,474,000
Partially Owned Property Income Statement Schedule
Operating revenue	21,308,000
Operating Expenses	6,453,000
Gross Profit	14,855,000
Depreciation	5,363,000
General and Administrative Expense	12,000
Operating Income	9,480,000
Interest and Other Income	3,000
Other Nonoperating Income (Expense)	(7,000)
Interest:
Interest Expense, Debt	(3,887,000)
Amortization of Financing Costs	(88,000)
Income (loss) before income and other taxes, (loss) from investments in unconsolidated entities, net (loss) on sales of land parcels and discontinued operations	5,501,000
Income and other tax (expense) benefit	(36,000)
(Loss) from investments in unconsolidated entities	(419,000)
Net income	5,046,000
Consolidated Total [Domain]
Partially Owned Property Balance Sheet Schedule
Partially Owned Consolidated Properties	20
Partially Owned Consolidated Units	4,020
ASSETS
Real Estate Investment Property, at Cost	1,033,382,000
Real Estate Investment Property, Accumulated Depreciation	(178,165,000)
Investment in real estate, net	855,217,000
Cash and Cash Equivalents, at Carrying Value	16,535,000
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	53,844,000
Restricted Cash and Cash Equivalents	42,297,000
Deferred Finance Costs, Net	2,407,000
Other Assets	32,313,000
Total assets	1,002,613,000
LIABILITIES AND EQUITY
Secured Debt	360,217,000
Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable	21,657,000
Interest Payable	1,283,000
Other Liabilities	1,283,000
Security Deposit Liability	1,860,000
Total liabilities	386,300,000
Noncontrolling Interests Partially Owned Properties	127,658,000
Parent Equity Interest	488,655,000
Total Equity Interest	616,313,000
Total liabilities and equity	1,002,613,000
Partially Owned Property Income Statement Schedule
Operating revenue	21,776,000
Operating Expenses	6,734,000
Gross Profit	15,042,000
Depreciation	5,363,000
General and Administrative Expense	119,000
Operating Income	9,560,000
Interest and Other Income	3,000
Other Nonoperating Income (Expense)	(49,000)
Interest:
Interest Expense, Debt	(3,887,000)
Amortization of Financing Costs	(88,000)
Income (loss) before income and other taxes, (loss) from investments in unconsolidated entities, net (loss) on sales of land parcels and discontinued operations	5,539,000
Income and other tax (expense) benefit	(36,000)
(Loss) from investments in unconsolidated entities	(419,000)
Net income	5,084,000
Unconsolidated Development Projects Held for and or Under Development [Domain]
Partially Owned Property Balance Sheet Schedule
Partially Owned Unconsolidated Properties	0
Partially Owned Unconsolidated Units	0
ASSETS
Real Estate Investment Property, at Cost	49,332,000
Real Estate Investment Property, Accumulated Depreciation	0
Investment in real estate, net	49,332,000
Cash and Cash Equivalents, at Carrying Value	450,000
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0
Restricted Cash and Cash Equivalents	0
Deferred Finance Costs, Net	65,000
Other Assets	0
Total assets	49,847,000
LIABILITIES AND EQUITY
Secured Debt	16,154,000
Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable	4,078,000
Interest Payable	32,000
Other Liabilities	339,000
Security Deposit Liability	0
Total liabilities	20,603,000
Noncontrolling Interests Partially Owned Properties	27,858,000
Parent Equity Interest	1,386,000
Total Equity Interest	29,244,000
Total liabilities and equity	49,847,000
Partially Owned Property Income Statement Schedule
Operating revenue	0
Operating Expenses	44,000
Gross Profit	(44,000)
Depreciation	0
General and Administrative Expense	0
Operating Income	(44,000)
Interest and Other Income	0
Other Nonoperating Income (Expense)	0
Interest:
Interest Expense, Debt	0
Amortization of Financing Costs	0
Income (loss) before income and other taxes, (loss) from investments in unconsolidated entities, net (loss) on sales of land parcels and discontinued operations	(44,000)
Income and other tax (expense) benefit	0
(Loss) from investments in unconsolidated entities	0
Net income	(44,000)
Unconsolidated Completed, Not Stabilized [Domain]
Partially Owned Property Balance Sheet Schedule
Partially Owned Unconsolidated Properties	3
Partially Owned Unconsolidated Units	1,333
ASSETS
Real Estate Investment Property, at Cost	285,191,000
Real Estate Investment Property, Accumulated Depreciation	(4,669,000)
Investment in real estate, net	280,522,000
Cash and Cash Equivalents, at Carrying Value	1,803,000
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0
Restricted Cash and Cash Equivalents	120,000
Deferred Finance Costs, Net	126,000
Other Assets	365,000
Total assets	282,936,000
LIABILITIES AND EQUITY
Secured Debt	176,232,000
Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable	915,000
Interest Payable	725,000
Other Liabilities	867,000
Security Deposit Liability	258,000
Total liabilities	178,997,000
Noncontrolling Interests Partially Owned Properties	73,412,000
Parent Equity Interest	30,527,000
Total Equity Interest	103,939,000
Total liabilities and equity	282,936,000
Partially Owned Property Income Statement Schedule
Operating revenue	4,528,000
Operating Expenses	1,917,000
Gross Profit	2,611,000
Depreciation	2,782,000
General and Administrative Expense	12,000
Operating Income	(183,000)
Interest and Other Income	0
Other Nonoperating Income (Expense)	0
Interest:
Interest Expense, Debt	(1,992,000)
Amortization of Financing Costs	(3,000)
Income (loss) before income and other taxes, (loss) from investments in unconsolidated entities, net (loss) on sales of land parcels and discontinued operations	(2,178,000)
Income and other tax (expense) benefit	0
(Loss) from investments in unconsolidated entities	0
Net income	(2,178,000)
Unconsolidated Operating [Domain]
Partially Owned Property Balance Sheet Schedule
Partially Owned Unconsolidated Properties	1
Partially Owned Unconsolidated Units	336
ASSETS
Real Estate Investment Property, at Cost	55,585,000
Real Estate Investment Property, Accumulated Depreciation	(5,052,000)
Investment in real estate, net	50,533,000
Cash and Cash Equivalents, at Carrying Value	1,378,000
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0
Restricted Cash and Cash Equivalents	48,000
Deferred Finance Costs, Net	4,000
Other Assets	1,032,000
Total assets	52,995,000
LIABILITIES AND EQUITY
Secured Debt	30,410,000
Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable	210,000
Interest Payable	0
Other Liabilities	863,000
Security Deposit Liability	109,000
Total liabilities	31,592,000
Noncontrolling Interests Partially Owned Properties	20,450,000
Parent Equity Interest	953,000
Total Equity Interest	21,403,000
Total liabilities and equity	52,995,000
Partially Owned Property Income Statement Schedule
Operating revenue	1,353,000
Operating Expenses	559,000
Gross Profit	794,000
Depreciation	447,000
General and Administrative Expense	43,000
Operating Income	304,000
Interest and Other Income	0
Other Nonoperating Income (Expense)	0
Interest:
Interest Expense, Debt	(279,000)
Amortization of Financing Costs	0
Income (loss) before income and other taxes, (loss) from investments in unconsolidated entities, net (loss) on sales of land parcels and discontinued operations	25,000
Income and other tax (expense) benefit	0
(Loss) from investments in unconsolidated entities	0
Net income	25,000
Unconsolidated Total [Domain]
Partially Owned Property Balance Sheet Schedule
Partially Owned Unconsolidated Properties	4
Partially Owned Unconsolidated Units	1,669
ASSETS
Real Estate Investment Property, at Cost	390,108,000
Real Estate Investment Property, Accumulated Depreciation	(9,721,000)
Investment in real estate, net	380,387,000
Cash and Cash Equivalents, at Carrying Value	3,631,000
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0
Restricted Cash and Cash Equivalents	168,000
Deferred Finance Costs, Net	195,000
Other Assets	1,397,000
Total assets	385,778,000
LIABILITIES AND EQUITY
Secured Debt	222,796,000
Accounts Payable And Accrued Liabilities Current And Noncurrent Other Than Interest And Dividend Payable	5,203,000
Interest Payable	757,000
Other Liabilities	2,069,000
Security Deposit Liability	367,000
Total liabilities	231,192,000
Noncontrolling Interests Partially Owned Properties	121,720,000
Parent Equity Interest	32,866,000
Total Equity Interest	154,586,000
Total liabilities and equity	385,778,000
Partially Owned Property Income Statement Schedule
Operating revenue	5,881,000
Operating Expenses	2,520,000
Gross Profit	3,361,000
Depreciation	3,229,000
General and Administrative Expense	55,000
Operating Income	77,000
Interest and Other Income	0
Other Nonoperating Income (Expense)	0
Interest:
Interest Expense, Debt	(2,271,000)
Amortization of Financing Costs	(3,000)
Income (loss) before income and other taxes, (loss) from investments in unconsolidated entities, net (loss) on sales of land parcels and discontinued operations	(2,197,000)
Income and other tax (expense) benefit	0
(Loss) from investments in unconsolidated entities	0
Net income	(2,197,000)
Residual JV [Domain]
ASSETS
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	147,600,000
Joint Venture Partner [Member]
Investments In Partially Owned Entities (Textuals) [Abstract]
Land purchase price	57,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	75,700,000
LIABILITIES AND EQUITY
Noncontrolling Interests Partially Owned Properties	117,350,387
Company's Portion [Member]
Investments In Partially Owned Entities (Textuals) [Abstract]
Land purchase price	76,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	102,500,000
Nexus Sawgrass [Member]
Investments In Partially Owned Entities (Textuals) [Abstract]
Project Cost	79,000,000
Maximum Debt Commitment	48,700,000
Debt Instrument, Maturity Date	Jan. 01, 2021
Debt Instrument, Interest Rate, Stated Percentage	5.60%
LIABILITIES AND EQUITY
Secured Debt	48,200,000
Domain [Member]
Investments In Partially Owned Entities (Textuals) [Abstract]
Project Cost	154,600,000
Maximum Debt Commitment	98,600,000
Debt Instrument, Maturity Date	Jan. 01, 2022
Debt Instrument, Interest Rate, Stated Percentage	5.75%
LIABILITIES AND EQUITY
Secured Debt	95,000,000
Archstone Transaction [Member]
Investments In Partially Owned Entities (Textuals) [Abstract]
Liquidation Value Preferred Interests	79,300,000
Business Acquisition, Percentage of Voting Interests Acquired		60.00%
Joint Venture Partner Ownership Percentage	40.00%
Company's Portion [Member]
Investments In Partially Owned Entities (Textuals) [Abstract]
Preferred Interests	39,000,000
Enclave at Wellington [Domain]
Investments In Partially Owned Entities (Textuals) [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired	95.00%
Initial Basis of Real Estate, Consolidated	26,200,000
Project Cost	50,000,000
Partially Owned Property Balance Sheet Schedule
Partially Owned Consolidated Units	268
East Palmetto Park [Domain]
Investments In Partially Owned Entities (Textuals) [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired	90.00%
Initial Basis of Real Estate, Consolidated	20,200,000
Partially Owned Consolidated Units to be Developed	377
Wisconsin Place [Domain]
Investments In Partially Owned Entities (Textuals) [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired	75.00%
Initial Basis of Real Estate, Consolidated	198,500,000
Partially Owned Property Balance Sheet Schedule
Partially Owned Consolidated Units	432
ASSETS
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	56,500,000
San Norterra [Domain]
Investments In Partially Owned Entities (Textuals) [Abstract]
Project Cost	53,300,000
Equity Method Investment, Ownership Percentage	85.00%
Initial Basis of Land, Unconsolidated	16,900,000
Maximum Debt Commitment	34,800,000
Debt Instrument, Description of Variable Rate Basis	LIBOR plus 2.00%
Debt Instrument, Maturity Date	Jan. 06, 2015
Partially Owned Property Balance Sheet Schedule
Partially Owned Unconsolidated Units	388
LIABILITIES AND EQUITY
Secured Debt	33,000,000
Waterton Tenside [Domain]
Investments In Partially Owned Entities (Textuals) [Abstract]
Equity Method Investment, Ownership Percentage	20.00%
Initial Basis of Land, Unconsolidated	5,100,000
Debt Instrument, Maturity Date	Dec. 01, 2018
Debt Instrument, Interest Rate, Stated Percentage	3.66%
Partially Owned Property Balance Sheet Schedule
Partially Owned Unconsolidated Units	336
LIABILITIES AND EQUITY
Secured Debt	30,400,000
1333 Powell (formerly Parkside at Emeryville) [Domain]
Investments In Partially Owned Entities (Textuals) [Abstract]
Project Cost	75,000,000
Equity Method Investment, Ownership Percentage	5.00%
Initial Basis of Land, Unconsolidated	(2,100,000)
Maximum Debt Commitment	39,500,000
Debt Instrument, Description of Variable Rate Basis	LIBOR plus 2.25%
Debt Instrument, Maturity Date	Aug. 14, 2015
Partially Owned Unconsolidated Units To Be Developed	176
Guarantor Obligations, Maximum Exposure	19,700,000
LIABILITIES AND EQUITY
Secured Debt	$ 16,200,000
London Interbank Offered Rate (LIBOR) [Member] | San Norterra [Domain]
Investments In Partially Owned Entities (Textuals) [Abstract]
Debt Instrument, Basis Spread on Variable Rate	2.00%
London Interbank Offered Rate (LIBOR) [Member] | 1333 Powell (formerly Parkside at Emeryville) [Domain]
Investments In Partially Owned Entities (Textuals) [Abstract]
Debt Instrument, Basis Spread on Variable Rate	2.25%