The per annum equivalent of the increased quarterly stock dividend the last time the dividend was changed.

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- Definition

The effective date, after a change in the dividend rate, of the current quarterly common stock dividend.

+ Details

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- 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

+ Details

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- Details

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- Definition

The month and year (YYYY-MM) that the dividend to be paid was declared.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 32

+ Details

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Financing Activities (Distributions and Capital Contributions) (Details) (USD $)	1 Months Ended	3 Months Ended		6 Months Ended
	May 31, 2011	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Distributions (Numeric)
Quarterly common stock dividend declaration date	2011-05
Effective date of change in quarterly common stock dividend - alternative	Jul. 01, 2011
Current quarterly common stock dividend		$ 0.350	$ 0.350	$ 0.700	$ 0.700
Annualized current quarterly common stock dividend	$ 1.40