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Single-Family Properties - Narrative (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 property | Dec. 31, 2017 USD ($) property | Dec. 31, 2016 USD ($) property | Dec. 31, 2015 USD ($)
Property Subject to or Available for Operating Lease |  |  |  |
Net proceeds received from sales of single-family properties and other |  | $ 87,063,000 | $ 88,590,000 | $ 0
Goodwill written off, sale of single-family properties |  |  | 400,000 |
Goodwill |  | 120,279,000 | 120,279,000 |
Insurance settlements receivable |  | 8,900,000 |  |
Hurricane-related charges, net |  | 7,963,000 | 0 | 0
Natural Disasters and Other Casualty Events |  |  |  |
Property Subject to or Available for Operating Lease |  |  |  |
Number of homes with major damage | property | 125 |  |  |
Number of homes with minor damage | property | 3,400 |  |  |
Impairment charge to write down the net book values of the impacted properties |  | 11,000,000 |  |
Additional repair, remediation and other costs |  | 5,900,000 |  |
Aggregate net book value of the impacted properties |  | 7,100,000 |  |
Single family homes |  |  |  |
Property Subject to or Available for Operating Lease |  |  |  |
Real estate investment properties unrecorded deed |  | 44,200,000 | 14,300,000 |
Depreciation expense |  | $ 281,200,000 | $ 262,100,000 | $ 223,900,000
Number of properties sold | property |  | 923 | 712 |
Net proceeds received from sales of single-family properties and other |  | $ 72,600,000 | $ 88,600,000 |
Gain on sale of single-family properties, net |  | 3,600,000 | $ 13,900,000 |
Receivable with imputed interest, face amount |  | 7,000,000 |  |
Receivable with imputed interest discount |  | $ 1,500,000 |  |

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