Subsequent Events - Real Estate Investment Activity (Details) $ in Millions	1 Months Ended
Feb. 08, 2019 USD ($) property	Dec. 31, 2018 USD ($) property
Subsequent Event [Line Items]
Carrying value of properties classified as held for sale		$ 2.6
Property Disposition, 2019 [Member]
Subsequent Event [Line Items]
Number of properties held for sale now disposed \| property		4
Carrying value of properties classified as held for sale		$ 1.9
Subsequent Event [Member] \| Acquisition, 2019 [Member]
Subsequent Event [Line Items]
Number of properties acquired \| property	3
Aggregate purchase price	$ 36.8
Subsequent Event [Member] \| Property Disposition, 2019 [Member]
Subsequent Event [Line Items]
Number of real estate properties disposed \| property	8
Aggregate gross sales price	$ 9.2
Company's share of proceeds	8.6
Estimated gain on sale of properties	$ 2.5

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 30
-Section 30
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- Definition

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

The number of businesses acquired by the entity during the period.

+ References

No definition available.

+ Details

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- Definition

The cash inflow from the sale of an investment interest in a joint venture that the reporting entity has not previously accounted for using consolidation or the equity method of accounting.

+ References

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-Publisher FASB
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-Section 45
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- Definition

The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

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- Definition

Carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(f))
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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

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- Definition

Number of Real Estate Properties Disposed

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Number of Real Estate Property Held For Sale, Disposed

+ References

No definition available.

+ Details

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