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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, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues | $ 240,261 | $ 253,800 | $ 257,321 | $ 254,423 | $ 254,788 | $ 257,135 | $ 257,323 | $ 258,825 | $ 1,005,805 | $ 1,028,071 | $ 985,675
Rental operation expenses |  |  |  |  |  |  |  |  | (277,084) | (293,693) | (281,107)
Net operating income (loss) |  |  |  |  |  |  |  |  | 728,721 | 734,378 | 704,568
Impairment charges |  |  |  |  |  |  |  |  | (110,906) | (279,021) | (29,175)
Depreciation and amortization |  |  |  |  |  |  |  |  | (389,519) | (402,045) | (402,825)
Interest income |  |  |  |  |  |  |  |  | 37,054 | 29,213 | 15,927
Other income (expense), net |  |  |  |  |  |  |  |  | 3,322 | (1,739) | (12,262)
Unallocated expenses |  |  |  |  |  |  |  |  | (295,471) | (321,395) | (323,459)
Equity in net income (loss) of joint ventures |  |  |  |  |  |  |  |  | 15,699 | (3,135) | 10,989
Impairment of joint venture investments |  |  |  |  |  |  |  |  | 0 | (1,909) | (30,652)
(Loss) gain on sale and change in control of interests, net |  |  |  |  |  |  |  |  | (1,087) | 7,772 | 87,996
(Loss) income from continuing operations |  |  |  |  |  |  |  |  | (12,187) | (237,881) | 21,107
Total gross real estate assets | 9,244,058 |  |  |  | 10,128,199 |  |  |  | 9,244,058 | 10,128,199 | 10,335,785
Notes receivable, net | 49,503 |  |  |  | 42,534 |  |  |  | 49,503 | 42,534 | 56,245
Operating Segments [Member] | Shopping Center [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 1,005,761 | 1,027,934 | 985,479
Rental operation expenses |  |  |  |  |  |  |  |  | (276,866) | (293,578) | (281,005)
Net operating income (loss) |  |  |  |  |  |  |  |  | 728,895 | 734,356 | 704,474
Impairment charges |  |  |  |  |  |  |  |  | (110,906) | (279,021) | (29,175)
Depreciation and amortization |  |  |  |  |  |  |  |  | (389,519) | (402,045) | (402,825)
Equity in net income (loss) of joint ventures |  |  |  |  |  |  |  |  | 15,699 | (3,135) | 10,989
Impairment of joint venture investments |  |  |  |  |  |  |  |  |  | (1,909) | (30,652)
(Loss) gain on sale and change in control of interests, net |  |  |  |  |  |  |  |  | (1,087) | 7,772 | 87,996
Total gross real estate assets | 9,244,058 |  |  |  | 10,128,199 |  |  |  | 9,244,058 | 10,128,199 | 10,335,785
Operating Segments [Member] | Loan Investments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 44 | 137 | 196
Rental operation expenses |  |  |  |  |  |  |  |  | (218) | (115) | (102)
Net operating income (loss) |  |  |  |  |  |  |  |  | (174) | 22 | 94
Interest income |  |  |  |  |  |  |  |  | 37,054 | 29,213 | 15,927
Other income (expense), net |  |  |  |  |  |  |  |  |  |  | (500)
Notes receivable, net | 442,826 |  |  |  | 437,144 |  |  |  | 442,826 | 437,144 | 357,754
Corporate, Non-Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Other income (expense), net |  |  |  |  |  |  |  |  | 3,322 | (1,739) | (11,762)
Unallocated expenses |  |  |  |  |  |  |  |  | (295,471) | (321,395) | (323,459)
Notes receivable, net | $ (393,323) |  |  |  | $ (394,610) |  |  |  | $ (393,323) | $ (394,610) | $ (301,509)

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