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Borrowing Arrangements - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($) Property property	Jan. 23, 2019 property	Dec. 31, 2018 USD ($) Property	Mar. 31, 2018
Debt Instrument
Number of pledged properties | Property	119		118
Pledged assets, not separately reported	$ 2,522.2		$ 2,489.8
Secured Debt
Debt Instrument
Weighted average interest rate (percentage)	4.50%
Secured Debt | Minimum
Debt Instrument
Stated interest rate (in percentage)	3.45%
Secured Debt | Maximum
Debt Instrument
Stated interest rate (in percentage)	8.87%
Drummer Boy
Debt Instrument
Stated interest rate (in percentage)				5.49%
Disposed of by Sale
Debt Instrument
Defeasance of debt	$ 11.2
Weighted average interest rate (percentage)	5.03%
Disposed of by Sale | Manufactured Homes in Indiana and Michigan
Debt Instrument
Number of properties sold | property	5	5

X

- Definition

Defeasance of Debt

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- Definition

The number of encumbered properties during the reporting period.

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- Definition

Number of Properties Sold

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
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- Definition

Weighted average interest rate of debt outstanding.

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- Definition

The carrying amount, as of the date of the latest financial statement presented, of real estate owned but transferred to serve as collateral for the payment of the related debt obligation, primarily a secured borrowing or repurchase agreement, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 50
-Paragraph 1A
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