Area of a real estate property.

No definition available.

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Balance Type:	na
Period Type:	instant

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 30

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 30

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the dividend to be paid was declared, in CCYY-MM-DD format.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate dividends declared during the period for each share of preferred stock outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Details

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Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
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Balance Type:
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- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_PreferredStockMember
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Subsequent Events (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	0 Months Ended	1 Months Ended
	Mar. 31, 2015	Apr. 16, 2015 property sqft	Apr. 23, 2015 property sqft
Subsequent Event [Line Items]
Number of buildings	137us-gaap_NumberOfRealEstateProperties
Area of real estate property	10,400,000.0us-gaap_AreaOfRealEstateProperty
2015 Acquisition [Member]
Subsequent Event [Line Items]
Purchase price	$ 154.1
2015 Acquisition [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Number of buildings		1	1
Area of real estate property		115,300.0	34,200.0
Purchase price		$ 11.2	$ 3.2
Common Stock [Member]
Subsequent Event [Line Items]
Dividends Payable, Date Declared	Feb. 18, 2015
Dividend per Share, Common stock	$ 0.160000
Dividends Payable, Date to be Paid	Apr. 21, 2015
Dividends Payable, Date of Record	Apr. 07, 2015
Common Stock [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Dividends Payable, Date Declared	May 05, 2015
Dividend per Share, Common stock	$ 0.16
Dividends Payable, Date to be Paid	Jul. 21, 2015
Dividends Payable, Date of Record	Jul. 07, 2015
Preferred Stock [Member]
Subsequent Event [Line Items]
Dividends Payable, Date Declared	Feb. 18, 2015
Preferred Stock, Dividends Per Share, Declared	$ 0.484375
Dividends Payable, Date to be Paid	Mar. 31, 2015
Dividends Payable, Date of Record	Mar. 10, 2015
Preferred Stock [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Dividends Payable, Date Declared	May 05, 2015
Preferred Stock, Dividends Per Share, Declared	$ 0.484375
Dividends Payable, Date to be Paid	Jun. 30, 2015
Dividends Payable, Date of Record	Jun. 11, 2015