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Debt Debt - Encumbered Properties (Details) $ in Thousands | Dec. 31, 2019 USD ($) property | Dec. 31, 2018 USD ($) property
--- | --- | ---
Debt Instrument [Line Items] |  |
Net Book Value | $ 7,986,276 | $ 8,020,597
Encumbered Properties |  |
Debt Instrument [Line Items] |  |
Number of Properties | property | 18,001 | 18,009
Net Book Value | $ 2,468,887 | $ 2,548,384
Encumbered Properties | AH4R 2014-SFR2 securitization |  |
Debt Instrument [Line Items] |  |
Number of Properties | property | 4,543 | 4,546
Net Book Value | $ 592,203 | $ 611,279
Encumbered Properties | AH4R 2014-SFR3 securitization |  |
Debt Instrument [Line Items] |  |
Number of Properties | property | 4,587 | 4,588
Net Book Value | $ 642,189 | $ 662,068
Encumbered Properties | AH4R 2015-SFR1 securitization |  |
Debt Instrument [Line Items] |  |
Number of Properties | property | 4,696 | 4,697
Net Book Value | $ 641,595 | $ 662,202
Encumbered Properties | AH4R 2015-SFR2 securitization |  |
Debt Instrument [Line Items] |  |
Number of Properties | property | 4,175 | 4,178
Net Book Value | $ 592,900 | $ 612,835

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- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
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- Definition Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 + Details
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