Investments in and Advances to Joint Ventures - Condensed Combined Statements of Operations of Unconsolidated Joint Venture Investments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Expenses from operations:
Operating expenses	$ 188,061	$ 192,397	$ 375,881	$ 669,383
Impairment charges			0	279,021
Depreciation and amortization	97,698	99,300	194,600	202,315
Interest expense	54,012	61,287	111,909	124,307
Other expense (income), net	(2,081)	(2,368)	(3,854)	1,060
Income (loss) from continuing operations	27,647	7,780	61,139	(260,228)
Gain (loss) on disposition of real estate, net	13,721	11,267	26,102	36,361
Company's share of equity in net income of joint ventures	817	1,317	12,091	1,070
Basis differential adjustments	300	325	3,447	633
Equity in net income of joint ventures	1,117	1,642	15,538	1,703
Unconsolidated Joint Ventures [Member]
Condensed Combined Statements of Operations
Revenues from operations	128,890	133,066	256,800	270,666
Expenses from operations:
Operating expenses	36,973	36,090	74,629	75,056
Impairment charges	0	0	0	448
Depreciation and amortization	49,021	51,482	98,056	108,219
Interest expense	33,319	33,593	66,641	74,496
Preferred share expense	8,305	6,415	16,569	12,729
Other expense (income), net	6,319	6,126	12,130	12,195
Total expenses	133,937	133,706	268,025	283,143
Income (loss) from continuing operations	(5,047)	(640)	(11,225)	(12,477)
Gain (loss) on disposition of real estate, net	114	(1,358)	53,597	(1,571)
Net (loss) income attributable to unconsolidated joint ventures	$ (4,933)	$ (1,998)	$ 42,372	$ (14,048)