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Single-Family Properties - Narrative (Details) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 USD ($) property | Jun. 30, 2017 USD ($) property | Jun. 30, 2018 USD ($) property | Jun. 30, 2017 USD ($) property | Dec. 31, 2017 USD ($)
Property Subject to or Available for Operating Lease |  |  |  |  |
Proceeds from the sale of real estate properties |  |  | $ 30,142,000 | $ 54,232,000 |
Proceeds from sale of land |  |  | 500,000 |  |
Gain (loss) on land sold |  |  | 100,000 |  |
Single Family Homes |  |  |  |  |
Property Subject to or Available for Operating Lease |  |  |  |  |
Real estate investment properties unrecorded deed | $ 4,800,000 |  | 4,800,000 |  | $ 44,200,000
Depreciation expense | $ 74,100,000 | $ 69,000,000 | $ 149,500,000 | $ 137,800,000 |
Number of real estate properties sold | property | 113 | 127 | 216 | 631 |
Proceeds from the sale of real estate properties | $ 18,200,000 | $ 15,700,000 | $ 29,600,000 | $ 39,800,000 |
Net gain (loss) on sale of single-family properties and other | $ 3,200,000 | 2,200,000 | $ 5,400,000 | 1,200,000 |
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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