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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Expenses from operations:
Operating expenses	$ 91,533	$ 172,560	$ 185,457	$ 356,073
Impairment charges	0	18,060	620	48,504
Depreciation and amortization	40,060	72,462	82,668	146,886
Interest expense	21,087	44,913	42,813	88,953
Other (income) expense, net	85	36,255	(68)	97,862
(Loss) gain on disposition of real estate, net	213	29,508	16,590	39,519
Company's share of equity in net income of joint ventures	1,602	3,506	2,447	11,979
Basis differential adjustments	189	315	387	628
Equity in net income of joint ventures	1,791	3,821	2,834	12,607
Unconsolidated Joint Ventures [Member]
Condensed Combined Statements of Operations
Revenues from operations	105,580	107,759	214,683	222,284
Expenses from operations:
Operating expenses	30,482	32,314	60,543	66,695
Impairment charges	0	0	12,267	16,910
Depreciation and amortization	36,969	37,299	76,473	76,976
Interest expense	25,286	24,946	50,942	49,189
Preferred share expense	5,484	6,317	10,943	12,825
Other (income) expense, net	5,885	6,616	11,341	14,037
Total expenses	104,106	107,492	222,509	236,632
Income (loss) before gain on disposition of real estate	1,474	267	(7,826)	(14,348)
(Loss) gain on disposition of real estate, net	(321)	12,356	15,645	50,376
Net income attributable to unconsolidated joint ventures	$ 1,153	$ 12,623	$ 7,819	$ 36,028