Investments in and Advances to Joint Ventures - Condensed Combined Statements of Operations of Unconsolidated Joint Venture Investments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Expenses from operations:
Operating expenses	$ 187,820	$ 476,986
Impairment charges	0	279,021
Depreciation and amortization	96,902	103,015
Interest expense	57,897	63,020
Other expense (income), net	(1,773)	3,428
Income (loss) from continuing operations	33,492	(268,008)
Gain (loss) on disposition of real estate, net	12,381	25,094
Company's share of equity in net income (loss) of joint ventures	11,274	(247)
Basis differential adjustments	3,147	308
Equity in net income of joint ventures	14,421	61
Unconsolidated Joint Ventures [Member]
Condensed Combined Statements of Operations
Revenues from operations	127,910	137,600
Expenses from operations:
Operating expenses	37,656	38,966
Impairment charges	0	448
Depreciation and amortization	49,035	56,737
Interest expense	33,322	40,903
Preferred share expense	8,264	6,314
Other expense (income), net	5,811	6,069
Total expenses	134,088	149,437
Income (loss) from continuing operations	(6,178)	(11,837)
Gain (loss) on disposition of real estate, net	53,483	(213)
Net income (loss) attributable to unconsolidated joint ventures	$ 47,305	$ (12,050)