Investments in and Advances to Joint Ventures - Condensed Combined Financial Information of Company's Unconsolidated Joint Venture Investments (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Condensed Combined Balance Sheets
Land	$ 2,145,471	$ 2,184,145
Buildings	6,908,815	6,965,632
Fixtures and tenant improvements	744,059	743,037
Total real estate rental property	9,798,345	9,892,814
Less: Accumulated depreciation	(2,060,005)	(2,062,899)
Real estate rental property, net	7,738,340	7,829,915
Land held for development and construction in progress	174,736	235,385
Total real estate assets, net	7,913,076	8,065,300
Other assets	353,419	359,913
Total assets	8,935,627	9,097,088
Mortgage debt	1,173,915	1,183,164
Total liabilities	5,496,706	5,633,619
Total liabilities and equity	8,935,627	9,097,088
Company's share of accumulated equity	108,531	115,871
Redeemable preferred equity	398,410	395,156
Basis differentials	(40,209)	(42,402)
Deferred development fees, net of portion related to the Company's interest	(2,477)	(2,449)
Amounts payable to the Company	2,577	1,556
Investments in and Advances to Joint Ventures	466,832	467,732
Unconsolidated Joint Ventures [Member]
Condensed Combined Balance Sheets
Land	1,306,704	1,343,889
Buildings	3,446,655	3,551,227
Fixtures and tenant improvements	184,497	191,581
Total real estate rental property	4,937,856	5,086,697
Less: Accumulated depreciation	(807,415)	(817,235)
Real estate rental property, net	4,130,441	4,269,462
Land held for development and construction in progress	54,846	52,390
Total real estate assets, net	4,185,287	4,321,852
Cash and restricted cash	69,576	58,916
Receivables, net	45,077	52,768
Other assets	304,255	318,546
Total assets	4,604,195	4,752,082
Mortgage debt	3,119,992	3,177,603
Notes and accrued interest payable to the Company	2,577	1,556
Other liabilities	212,237	219,799
Total liabilities	3,334,806	3,398,958
Redeemable preferred equity	398,410	395,156
Accumulated equity	870,979	957,968
Total liabilities and equity	$ 4,604,195	$ 4,752,082