Segment Reporting - Segment Statement of Operations (Details) - USD ($) $ in Thousands |
3 Months Ended |
12 Months Ended |
Dec. 31, 2019 |
Sep. 30, 2019 |
Jun. 30, 2019 |
Mar. 31, 2019 |
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Segment Reporting Information [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Rental and resident fee income |
|
|
|
|
|
|
|
|
$ 291,219
|
$ 289,336
|
$ 282,880
|
Net interest income on debt and securities |
|
|
|
|
|
|
|
|
7,703
|
9,031
|
14,141
|
Other revenue |
|
|
|
|
|
|
|
|
1,959
|
4,935
|
2,895
|
Property operating expenses |
|
|
|
|
|
|
|
|
(181,214)
|
(188,761)
|
(163,837)
|
Interest expense |
|
|
|
|
|
|
|
|
(68,896)
|
(70,196)
|
(61,082)
|
Other expenses related to securitization trust |
|
|
|
|
|
|
|
|
0
|
(811)
|
(3,922)
|
Transaction costs |
|
|
|
|
|
|
|
|
(122)
|
(888)
|
(9,407)
|
Asset management and other fees - related party |
|
|
|
|
|
|
|
|
(19,789)
|
(23,478)
|
(41,954)
|
General and administrative expenses |
|
|
|
|
|
|
|
|
(12,761)
|
(14,390)
|
(13,488)
|
Depreciation and amortization |
|
|
|
|
|
|
|
|
(70,989)
|
(107,133)
|
(105,459)
|
Impairment loss |
|
|
|
|
|
|
|
|
(27,554)
|
(36,277)
|
(5,000)
|
Unrealized gain (loss) on mortgage loans held in securitization trust, net |
|
|
|
|
|
|
|
|
0
|
0
|
1,503
|
Realized gain (loss) on investments and other |
|
|
|
|
|
|
|
|
6,314
|
20,243
|
116
|
Income (loss) before equity in earnings (losses) of unconsolidated ventures and income tax benefit (expense) |
|
|
|
|
|
|
|
|
(74,130)
|
(118,389)
|
(102,614)
|
Equity in earnings (losses) of unconsolidated ventures |
$ 4,121
|
$ (3,037)
|
$ (4,405)
|
$ (224)
|
$ (37,424)
|
$ 16,631
|
$ (4,098)
|
$ (8,626)
|
(3,545)
|
(33,517)
|
(35,314)
|
Income tax benefit (expense) |
|
|
|
|
|
|
|
|
(75)
|
(114)
|
(43)
|
Net income (loss) |
$ (26,924)
|
$ (14,697)
|
$ (17,460)
|
$ (18,669)
|
$ (77,257)
|
$ (6,670)
|
$ (34,205)
|
$ (33,888)
|
(77,750)
|
(152,020)
|
(137,971)
|
Discount accretion income |
|
|
|
|
|
|
|
|
113
|
101
|
92
|
Operating Segments |
|
|
|
|
|
|
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Rental and resident fee income |
|
|
|
|
|
|
|
|
|
289,336
|
282,880
|
Net interest income on debt and securities |
|
|
|
|
|
|
|
|
|
8,220
|
10,219
|
Other revenue |
|
|
|
|
|
|
|
|
|
4,935
|
2,895
|
Property operating expenses |
|
|
|
|
|
|
|
|
|
(188,761)
|
(163,837)
|
Interest expense |
|
|
|
|
|
|
|
|
|
(70,196)
|
(61,082)
|
Other expenses related to securitization trust |
|
|
|
|
|
|
|
|
|
0
|
0
|
Transaction costs |
|
|
|
|
|
|
|
|
|
(888)
|
(9,407)
|
Asset management and other fees - related party |
|
|
|
|
|
|
|
|
|
(23,478)
|
(41,954)
|
General and administrative expenses |
|
|
|
|
|
|
|
|
|
(14,390)
|
(13,488)
|
Depreciation and amortization |
|
|
|
|
|
|
|
|
|
(107,133)
|
(105,459)
|
Impairment loss |
|
|
|
|
|
|
|
|
|
(36,277)
|
(5,000)
|
Unrealized gain (loss) on mortgage loans held in securitization trust, net |
|
|
|
|
|
|
|
|
|
0
|
1,503
|
Realized gain (loss) on investments and other |
|
|
|
|
|
|
|
|
|
20,243
|
116
|
Income (loss) before equity in earnings (losses) of unconsolidated ventures and income tax benefit (expense) |
|
|
|
|
|
|
|
|
|
(118,389)
|
(102,614)
|
Equity in earnings (losses) of unconsolidated ventures |
|
|
|
|
|
|
|
|
|
(33,517)
|
(35,314)
|
Income tax benefit (expense) |
|
|
|
|
|
|
|
|
|
(114)
|
(43)
|
Net income (loss) |
|
|
|
|
|
|
|
|
|
(152,020)
|
(137,971)
|
Operating Segments | Net Lease |
|
|
|
|
|
|
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Rental and resident fee income |
|
|
|
|
|
|
|
|
33,423
|
34,275
|
34,798
|
Net interest income on debt and securities |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Other revenue |
|
|
|
|
|
|
|
|
1
|
1
|
5
|
Property operating expenses |
|
|
|
|
|
|
|
|
(11)
|
(1,346)
|
(31)
|
Interest expense |
|
|
|
|
|
|
|
|
(12,434)
|
(13,326)
|
(12,266)
|
Other expenses related to securitization trust |
|
|
|
|
|
|
|
|
|
0
|
0
|
Transaction costs |
|
|
|
|
|
|
|
|
0
|
(60)
|
(435)
|
Asset management and other fees - related party |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
General and administrative expenses |
|
|
|
|
|
|
|
|
(268)
|
(183)
|
(82)
|
Depreciation and amortization |
|
|
|
|
|
|
|
|
(14,329)
|
(13,694)
|
(13,127)
|
Impairment loss |
|
|
|
|
|
|
|
|
(4,132)
|
(5,094)
|
(5,000)
|
Unrealized gain (loss) on mortgage loans held in securitization trust, net |
|
|
|
|
|
|
|
|
|
0
|
0
|
Realized gain (loss) on investments and other |
|
|
|
|
|
|
|
|
5,872
|
0
|
0
|
Income (loss) before equity in earnings (losses) of unconsolidated ventures and income tax benefit (expense) |
|
|
|
|
|
|
|
|
8,122
|
573
|
3,862
|
Equity in earnings (losses) of unconsolidated ventures |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Income tax benefit (expense) |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Net income (loss) |
|
|
|
|
|
|
|
|
8,122
|
573
|
3,862
|
Operating Segments | Operating |
|
|
|
|
|
|
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Rental and resident fee income |
|
|
|
|
|
|
|
|
257,796
|
255,061
|
248,082
|
Net interest income on debt and securities |
|
|
|
|
|
|
|
|
0
|
0
|
(1)
|
Other revenue |
|
|
|
|
|
|
|
|
1,237
|
3,718
|
2,244
|
Property operating expenses |
|
|
|
|
|
|
|
|
(181,203)
|
(187,415)
|
(163,806)
|
Interest expense |
|
|
|
|
|
|
|
|
(56,360)
|
(56,595)
|
(48,742)
|
Other expenses related to securitization trust |
|
|
|
|
|
|
|
|
|
0
|
0
|
Transaction costs |
|
|
|
|
|
|
|
|
(122)
|
(828)
|
(8,972)
|
Asset management and other fees - related party |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
General and administrative expenses |
|
|
|
|
|
|
|
|
(42)
|
(856)
|
(866)
|
Depreciation and amortization |
|
|
|
|
|
|
|
|
(56,660)
|
(93,439)
|
(92,332)
|
Impairment loss |
|
|
|
|
|
|
|
|
(23,422)
|
(31,183)
|
0
|
Unrealized gain (loss) on mortgage loans held in securitization trust, net |
|
|
|
|
|
|
|
|
|
0
|
0
|
Realized gain (loss) on investments and other |
|
|
|
|
|
|
|
|
719
|
2,525
|
116
|
Income (loss) before equity in earnings (losses) of unconsolidated ventures and income tax benefit (expense) |
|
|
|
|
|
|
|
|
(58,057)
|
(109,012)
|
(64,277)
|
Equity in earnings (losses) of unconsolidated ventures |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Income tax benefit (expense) |
|
|
|
|
|
|
|
|
(75)
|
(114)
|
(43)
|
Net income (loss) |
|
|
|
|
|
|
|
|
(58,132)
|
(109,126)
|
(64,320)
|
Operating Segments | Unconsolidated Investments |
|
|
|
|
|
|
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Rental and resident fee income |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Net interest income on debt and securities |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Other revenue |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Property operating expenses |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Interest expense |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Other expenses related to securitization trust |
|
|
|
|
|
|
|
|
|
0
|
0
|
Transaction costs |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Asset management and other fees - related party |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
General and administrative expenses |
|
|
|
|
|
|
|
|
0
|
(2)
|
0
|
Depreciation and amortization |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Impairment loss |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Unrealized gain (loss) on mortgage loans held in securitization trust, net |
|
|
|
|
|
|
|
|
|
0
|
0
|
Realized gain (loss) on investments and other |
|
|
|
|
|
|
|
|
0
|
14,086
|
0
|
Income (loss) before equity in earnings (losses) of unconsolidated ventures and income tax benefit (expense) |
|
|
|
|
|
|
|
|
0
|
14,084
|
0
|
Equity in earnings (losses) of unconsolidated ventures |
|
|
|
|
|
|
|
|
(3,545)
|
(33,517)
|
(35,314)
|
Income tax benefit (expense) |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Net income (loss) |
|
|
|
|
|
|
|
|
(3,545)
|
(19,433)
|
(35,314)
|
Operating Segments | Debt and Securities |
|
|
|
|
|
|
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Rental and resident fee income |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Net interest income on debt and securities |
|
|
|
|
|
|
|
|
7,703
|
8,534
|
11,749
|
Other revenue |
|
|
|
|
|
|
|
|
35
|
375
|
0
|
Property operating expenses |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Interest expense |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Other expenses related to securitization trust |
|
|
|
|
|
|
|
|
|
0
|
0
|
Transaction costs |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Asset management and other fees - related party |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
General and administrative expenses |
|
|
|
|
|
|
|
|
(38)
|
(46)
|
(49)
|
Depreciation and amortization |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Impairment loss |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Unrealized gain (loss) on mortgage loans held in securitization trust, net |
|
|
|
|
|
|
|
|
|
(314)
|
(26)
|
Realized gain (loss) on investments and other |
|
|
|
|
|
|
|
|
0
|
3,495
|
0
|
Income (loss) before equity in earnings (losses) of unconsolidated ventures and income tax benefit (expense) |
|
|
|
|
|
|
|
|
7,700
|
12,044
|
11,674
|
Equity in earnings (losses) of unconsolidated ventures |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Income tax benefit (expense) |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Net income (loss) |
|
|
|
|
|
|
|
|
7,700
|
12,044
|
11,674
|
Operating Segments | Corporate |
|
|
|
|
|
|
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Rental and resident fee income |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Net interest income on debt and securities |
|
|
|
|
|
|
|
|
0
|
(314)
|
(1,529)
|
Other revenue |
|
|
|
|
|
|
|
|
686
|
841
|
646
|
Property operating expenses |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Interest expense |
|
|
|
|
|
|
|
|
(102)
|
(275)
|
(74)
|
Other expenses related to securitization trust |
|
|
|
|
|
|
|
|
|
0
|
0
|
Transaction costs |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Asset management and other fees - related party |
|
|
|
|
|
|
|
|
(19,789)
|
(23,478)
|
(41,954)
|
General and administrative expenses |
|
|
|
|
|
|
|
|
(12,413)
|
(13,303)
|
(12,491)
|
Depreciation and amortization |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Impairment loss |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Unrealized gain (loss) on mortgage loans held in securitization trust, net |
|
|
|
|
|
|
|
|
|
314
|
1,529
|
Realized gain (loss) on investments and other |
|
|
|
|
|
|
|
|
(277)
|
137
|
0
|
Income (loss) before equity in earnings (losses) of unconsolidated ventures and income tax benefit (expense) |
|
|
|
|
|
|
|
|
(31,895)
|
(36,078)
|
(53,873)
|
Equity in earnings (losses) of unconsolidated ventures |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Income tax benefit (expense) |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Net income (loss) |
|
|
|
|
|
|
|
|
$ (31,895)
|
(36,078)
|
(53,873)
|
Discount accretion income |
|
|
|
|
|
|
|
|
|
300
|
1,500
|
Investing VIE |
|
|
|
|
|
|
|
|
|
|
|
Segment Reporting Information [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Rental and resident fee income |
|
|
|
|
|
|
|
|
|
0
|
0
|
Net interest income on debt and securities |
|
|
|
|
|
|
|
|
|
811
|
3,922
|
Other revenue |
|
|
|
|
|
|
|
|
|
0
|
0
|
Property operating expenses |
|
|
|
|
|
|
|
|
|
0
|
0
|
Interest expense |
|
|
|
|
|
|
|
|
|
0
|
0
|
Other expenses related to securitization trust |
|
|
|
|
|
|
|
|
|
(811)
|
(3,922)
|
Transaction costs |
|
|
|
|
|
|
|
|
|
0
|
0
|
Asset management and other fees - related party |
|
|
|
|
|
|
|
|
|
0
|
0
|
General and administrative expenses |
|
|
|
|
|
|
|
|
|
0
|
0
|
Depreciation and amortization |
|
|
|
|
|
|
|
|
|
0
|
0
|
Impairment loss |
|
|
|
|
|
|
|
|
|
0
|
0
|
Unrealized gain (loss) on mortgage loans held in securitization trust, net |
|
|
|
|
|
|
|
|
|
0
|
0
|
Realized gain (loss) on investments and other |
|
|
|
|
|
|
|
|
|
0
|
0
|
Income (loss) before equity in earnings (losses) of unconsolidated ventures and income tax benefit (expense) |
|
|
|
|
|
|
|
|
|
0
|
0
|
Equity in earnings (losses) of unconsolidated ventures |
|
|
|
|
|
|
|
|
|
0
|
0
|
Income tax benefit (expense) |
|
|
|
|
|
|
|
|
|
0
|
0
|
Net income (loss) |
|
|
|
|
|
|
|
|
|
$ 0
|
$ 0
|