Segment Information - Summary of Information about Company's Reportable Operating Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Rental income	$ 108,060	$ 126,148	$ 332,555	$ 529,916
Other income	13,580	16,163	48,764	33,879
Business interruption income	885	1,784	885	6,884
Total revenue from operations	122,525	144,095	382,204	570,679
Rental operation expenses	(33,459)	(39,597)	(106,584)	(169,185)
Net operating income	89,066	104,498	275,620	401,494
Impairment charges	(2,750)	(19,890)	(3,370)	(68,394)
Hurricane property (loss) credit, net		157		(817)
Depreciation and amortization	(40,732)	(49,629)	(123,400)	(196,515)
Interest income	4,616	5,055	13,658	15,412
Other income (expense), net	(322)	(1,454)	(254)	(99,316)
Unallocated expenses	(36,464)	(42,194)	(108,321)	(161,268)
Equity in net income (loss) of joint ventures	2,612	(2,920)	5,446	9,687
Reserve of preferred equity interests, net	(6,373)	(2,201)	(12,106)	(4,537)
Gain on disposition of real estate, net	14,497	124	31,087	39,643
Income (loss) before tax expense	24,150	(8,454)	78,360	(64,611)
Total gross real estate assets	4,609,930	5,171,227	4,609,930	5,171,227
Notes receivable, net	19,670	19,670	19,670	19,670	$ 19,675
Operating Segments [Member] | Shopping Center [Member]
Segment Reporting Information [Line Items]
Rental income	108,060	126,148	332,555	529,916
Other income	13,567	16,149	48,722	33,836
Business interruption income				5,100
Total revenue from operations	121,627	142,297	381,277	568,852
Rental operation expenses	(33,456)	(39,597)	(106,574)	(169,185)
Net operating income	88,171	102,700	274,703	399,667
Impairment charges	(2,750)	(19,890)	(3,370)	(68,394)
Hurricane property (loss) credit, net				(974)
Depreciation and amortization	(40,732)	(49,629)	(123,400)	(196,515)
Equity in net income (loss) of joint ventures	2,612	(2,920)	5,446	9,687
Gain on disposition of real estate, net	14,497	124	31,087	39,643
Total gross real estate assets	4,609,930	5,171,227	4,609,930	5,171,227
Operating Segments [Member] | Loan Investments [Member]
Segment Reporting Information [Line Items]
Rental income	0		0	0
Other income	13	14	42	43
Business interruption income				0
Total revenue from operations	13	14	42	43
Rental operation expenses	(3)	0	(10)	0
Net operating income	10	14	32	43
Interest income	4,616	5,055	13,658	15,412
Reserve of preferred equity interests, net	(6,373)	(2,201)	(12,106)	(4,537)
Notes receivable, net	182,400	223,748	182,400	223,748
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Business interruption income	885	1,784	885	1,784
Total revenue from operations	885	1,784	885	1,784
Net operating income	885	1,784	885	1,784
Hurricane property (loss) credit, net		157		157
Interest income			0
Other income (expense), net	(322)	(1,454)	(254)	(99,316)
Unallocated expenses	(36,464)	(42,194)	(108,321)	(161,268)
Notes receivable, net	$ (162,730)	$ (204,078)	$ (162,730)	$ (204,078)