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Segment Information - Summary of Information about Company's Reportable Operating Segments (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | $ 253,800 | $ 257,135 | $ 765,544 | $ 773,283 |
Rental operation expenses | (68,169) | (73,348) | (213,075) | (223,529) |
Net operating income (loss) | 185,631 | 183,787 | 552,469 | 549,754 |
Impairment charges | (104,877) | 0 | (104,877) | (279,021) |
Depreciation and amortization | (95,451) | (97,155) | (290,051) | (299,470) |
Interest income | 9,304 | 7,331 | 27,800 | 21,703 |
Other income (expense), net | (384) | (240) | 3,470 | (1,300) |
Unallocated expenses | (73,123) | (76,341) | (222,110) | (243,987) |
Equity in net (loss) income of joint ventures | (1,457) | 648 | 14,081 | 2,351 |
(Loss) gain on sale and change in control of interests, net | (1,087) | 0 | (1,087) | 7,772 |
(Loss) income from continuing operations | (81,444) | 18,030 | (20,305) | (242,198) |
Total gross real estate assets | 9,911,432 | 10,155,375 | 9,911,432 | 10,155,375 |
Notes receivable, net | 44,823 | 47,430 | 44,823 | 47,430 | $ 42,534
Operating Segments [Member] | Shopping Center [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 253,787 | 257,109 | 765,514 | 773,162 |
Rental operation expenses | (68,107) | (73,280) | (212,857) | (223,425) |
Net operating income (loss) | 185,680 | 183,829 | 552,657 | 549,737 |
Impairment charges | (104,877) |  | (104,877) | (279,021) |
Depreciation and amortization | (95,451) | (97,155) | (290,051) | (299,470) |
Equity in net (loss) income of joint ventures | (1,457) | 648 | 14,081 | 2,351 |
(Loss) gain on sale and change in control of interests, net | (1,087) |  | (1,087) | 7,772 |
Total gross real estate assets | 9,911,432 | 10,155,375 | 9,911,432 | 10,155,375 |
Operating Segments [Member] | Loan Investments [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 13 | 26 | 30 | 121 |
Rental operation expenses | (62) | (68) | (218) | (104) |
Net operating income (loss) | (49) | (42) | (188) | 17 |
Interest income | 9,304 | 7,331 | 27,800 | 21,703 |
Notes receivable, net | 447,070 | 357,648 | 447,070 | 357,648 |
Corporate, Non-Segment [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Other income (expense), net | (384) | (240) | 3,470 | (1,300) |
Unallocated expenses | (73,123) | (76,341) | (222,110) | (243,987) |
Notes receivable, net | $ (402,247) | $ (310,218) | $ (402,247) | $ (310,218) |

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