Fair Value Measurements - Impaired Assets, Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Investments in single-family residential properties, net held for use and held for sale impairment adjustments
Total impairments	$ (603)	$ (1,037)
Rental Properties \| Fair Value, Measurements, Nonrecurring \| Level 3
Investments in single-family residential properties, net held for use and held for sale impairment adjustments
Pre-impairment amount	3,225	7,242
Total impairments	(603)	(770)
Fair value	2,622	6,472
Rental Properties \| Fair Value, Measurements, Nonrecurring \| Level 3
Investments in single-family residential properties, net held for use and held for sale impairment adjustments
Pre-impairment amount	0	496
Total impairments	0	(267)
Fair value	$ 0	$ 229

Real Estate Additions, Investments in Single-Family Residential Properties, Gross

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- Definition

Real Estate Additions, Investments in Single-Family Residential Properties, Net of Impairments

+ References

No definition available.

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- Definition

The charge against earnings in the period to reduce the carrying amount of real property to fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=64862545&loc=d3e2921-110230

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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