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

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

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Date the dividend to be paid was declared, 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

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 32

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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A description detailing whether the date through which subsequent events have been evaluated is the date the financial statements were issued or the date financial statements were available to be issued.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 855

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314015-165662

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Basis Of Presentation (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended	3 Months Ended		6 Months Ended
Basis Of Presentation (Details) (USD $)	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Sep. 30, 2012 Dividend Declared [Member]	Jun. 30, 2012 Dividend Declared [Member]	Jun. 30, 2012 Dividend Declared [Member]
Subsequent Event [Line Items]
Subsequent Event, Date Evaluated, Description			The Company evaluated events and transactions that occurred after the balance sheet date but before financial statements were issued
Dividends Payable, Date Declared								Jul. 20, 2012
Quarterly dividend per share	$ 0.40	$ 0.36	$ 0.80	$ 0.72	$ 1.52	$ 0.44	$ 0.40