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Segment Information - Summary of Information about Company's Reportable Operating Segments (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues | $ 217,556 | $ 227,424 | $ 236,187 | $ 240,421 | $ 240,261 | $ 253,800 | $ 257,321 | $ 254,423 | $ 921,588 | $ 1,005,805 | $ 1,028,071
Rental operation expenses |  |  |  |  |  |  |  |  | (250,917) | (277,084) | (293,693)
Net operating income |  |  |  |  |  |  |  |  | 670,671 | 728,721 | 734,378
Impairment charges | (280,100) |  |  |  |  |  |  |  | (340,480) | (110,906) | (279,021)
Hurricane casualty and impairment loss |  |  |  |  |  |  |  |  | (5,930) | 0 | 0
Depreciation and amortization |  |  |  |  |  |  |  |  | (346,204) | (389,519) | (402,045)
Interest income |  |  |  |  |  |  |  |  | 28,364 | 37,054 | 29,213
Other income (expense), net |  |  |  |  |  |  |  |  | (68,003) | 3,322 | (1,739)
Unallocated expenses |  |  |  |  |  |  |  |  | (290,919) | (295,471) | (321,395)
Equity in net income (loss) of joint ventures |  |  |  |  |  |  |  |  | 8,837 | 15,699 | (3,135)
Impairment of joint venture investments |  |  |  |  |  |  |  |  | 0 | 0 | (1,909)
Gain (loss) on sale and change in control of interests, net |  |  |  |  |  |  |  |  | 368 | (1,087) | 7,772
Reserve of preferred equity interests |  |  |  |  |  |  |  |  | (61,000) | 0 | 0
Loss from continuing operations |  |  |  |  |  |  |  |  | (404,296) | (12,187) | (237,881)
Total gross real estate assets | 8,248,003 |  |  |  | 9,244,058 |  |  |  | 8,248,003 | 9,244,058 | 10,128,199
Notes receivable, net | 19,675 |  |  |  | 49,503 |  |  |  | 19,675 | 49,503 | 42,534
Operating Segments [Member] | Shopping Center [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 921,531 | 1,005,761 | 1,027,934
Rental operation expenses |  |  |  |  |  |  |  |  | (250,906) | (276,866) | (293,578)
Net operating income |  |  |  |  |  |  |  |  | 670,625 | 728,895 | 734,356
Impairment charges |  |  |  |  |  |  |  |  | (340,480) | (110,906) | (279,021)
Hurricane casualty and impairment loss |  |  |  |  |  |  |  |  | (5,930) |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | (346,204) | (389,519) | (402,045)
Interest income |  |  |  |  |  |  |  |  | 0 | 0 | 0
Other income (expense), net |  |  |  |  |  |  |  |  | 0 | 0 | 0
Unallocated expenses |  |  |  |  |  |  |  |  | 0 | 0 | 0
Equity in net income (loss) of joint ventures |  |  |  |  |  |  |  |  | 8,837 | 15,699 | (3,135)
Impairment of joint venture investments |  |  |  |  |  |  |  |  |  |  | (1,909)
Gain (loss) on sale and change in control of interests, net |  |  |  |  |  |  |  |  | 368 | (1,087) | 7,772
Reserve of preferred equity interests |  |  |  |  |  |  |  |  | (61,000) |  |
Loss from continuing operations |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total gross real estate assets | 8,248,003 |  |  |  | 9,244,058 |  |  |  | 8,248,003 | 9,244,058 | 10,128,199
Notes receivable, net | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Operating Segments [Member] | Loan Investments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 57 | 44 | 137
Rental operation expenses |  |  |  |  |  |  |  |  | (11) | (218) | (115)
Net operating income |  |  |  |  |  |  |  |  | 46 | (174) | 22
Impairment charges |  |  |  |  |  |  |  |  | 0 | 0 | 0
Hurricane casualty and impairment loss |  |  |  |  |  |  |  |  | 0 |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 0 | 0 | 0
Interest income |  |  |  |  |  |  |  |  | 28,364 | 37,054 | 29,213
Other income (expense), net |  |  |  |  |  |  |  |  | 0 | 0 | 0
Unallocated expenses |  |  |  |  |  |  |  |  | 0 | 0 | 0
Equity in net income (loss) of joint ventures |  |  |  |  |  |  |  |  | 0 | 0 | 0
Impairment of joint venture investments |  |  |  |  |  |  |  |  |  |  | 0
Gain (loss) on sale and change in control of interests, net |  |  |  |  |  |  |  |  | 0 | 0 | 0
Reserve of preferred equity interests |  |  |  |  |  |  |  |  | 0 |  |
Loss from continuing operations |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total gross real estate assets | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Notes receivable, net | 297,451 |  |  |  | 442,826 |  |  |  | 297,451 | 442,826 | 437,144
Corporate, Non-Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 0 | 0 | 0
Rental operation expenses |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net operating income |  |  |  |  |  |  |  |  | 0 | 0 | 0
Impairment charges |  |  |  |  |  |  |  |  | 0 | 0 | 0
Hurricane casualty and impairment loss |  |  |  |  |  |  |  |  | 0 |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 0 | 0 | 0
Interest income |  |  |  |  |  |  |  |  | 0 | 0 | 0
Other income (expense), net |  |  |  |  |  |  |  |  | (68,003) | 3,322 | (1,739)
Unallocated expenses |  |  |  |  |  |  |  |  | (290,919) | (295,471) | (321,395)
Equity in net income (loss) of joint ventures |  |  |  |  |  |  |  |  | 0 | 0 | 0
Impairment of joint venture investments |  |  |  |  |  |  |  |  |  |  | 0
Gain (loss) on sale and change in control of interests, net |  |  |  |  |  |  |  |  | 0 | 0 | 0
Reserve of preferred equity interests |  |  |  |  |  |  |  |  | 0 |  |
Loss from continuing operations |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total gross real estate assets | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Notes receivable, net | $ (277,776) |  |  |  | $ (393,323) |  |  |  | $ (277,776) | $ (393,323) | $ (394,610)

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