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Organization and Background (Details)	Mar. 31, 2018 state property
Organization and Background
Number of real estate properties	119
Number of states in which properties are located | state	30
Properties owned by consolidated joint ventures
Organization and Background
Number of real estate properties	5
Properties owned by unconsolidated joint ventures
Organization and Background
Number of real estate properties	5

X

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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X

- Definition

The number of states the entity operates in as of the balance sheet date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Details

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X

- Details

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Namespace Prefix:
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