Real Estate Properties Leased Percent

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- Definition

The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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=6959260&loc=d3e187085-122770

+ Details

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- Definition

The amount of square footage related to a real estate property.

+ Details

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Balance Type:	na
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- Definition

The amount authorized by an entity's Board of Directors under a stock repurchase plan.

+ Details

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- 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.

+ Details

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Subsequent Events (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	9 Months Ended	12 Months Ended	3 Months Ended	0 Months Ended		0 Months Ended
	Sep. 30, 2011	Dec. 31, 2010	Dec. 31, 2011 Dividend Declared [Member]	Oct. 30, 2011 Acquisition [Member] squarefeet	Oct. 05, 2011 Acquisition [Member]	Nov. 02, 2011 Stock Repurchase Program [Member]
Subsequent Event [Line Items]
Acquisition Price					$ 23.9
Square Footage of Real Estate Property				176,000
Real Estate Properties Leased, Percent					19.00%
Dividends declared (in dollars per share)	$ 0.945	$ 1.26	$ 0.3150
Stock Repurchase Program, Authorized Amount						$ 300.0