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Single-Family Properties - Narrative (Details) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 USD ($) property | Sep. 30, 2017 USD ($) property | Sep. 30, 2018 USD ($) property | Sep. 30, 2017 USD ($) property | Dec. 31, 2017 USD ($)
Property Subject to or Available for Operating Lease |  |  |  |  |
Proceeds from the sale of real estate properties |  |  | $ 47,757,000 | $ 68,618,000 |
Proceeds from sale of land | $ 300,000 |  | 800,000 |  |
Gain (loss) on land sold | 100,000 |  | 200,000 |  |
Single Family Homes |  |  |  |  |
Property Subject to or Available for Operating Lease |  |  |  |  |
Real estate investment properties unrecorded deed | 4,000,000 |  | 4,000,000 |  | $ 44,200,000
Depreciation expense | $ 75,200,000 | $ 71,200,000 | $ 224,700,000 | $ 208,900,000 |
Number of real estate properties sold | property | 95 | 107 | 311 | 738 |
Proceeds from the sale of real estate properties | $ 17,400,000 | $ 14,400,000 | $ 47,000,000 | $ 54,200,000 |
Net gain (loss) on sale of single-family properties and other | $ 3,400,000 | 1,900,000 | $ 8,800,000 | 3,100,000 |
Note receivable |  | 7,000,000 |  | 7,000,000 |
Discount of note receivable |  | $ 1,500,000 |  | $ 1,500,000 |

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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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