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Stockholder's Equity (Details 2) (USD $)	0 Months Ended	3 Months Ended				9 Months Ended
	Nov. 06, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Cash dividends paid or payable per share
Dividend per Share, common stock		$ 0.12	$ 0.1200	$ 0.1000	$ 0.10	$ 0.34	$ 0.30
Dividend per Share, preferred stock	$ 0.484375
Common Stock [Member]
Cash dividends paid or payable per share
Declaration Date		Aug. 03, 2012	May 04, 2012	Feb. 21, 2012
Record Date		Oct. 05, 2012	Jul. 09, 2012	Apr. 05, 2012
Date Paid		Oct. 26, 2012	Jul. 23, 2012	Apr. 19, 2012
Preferred Stock [Member]
Cash dividends paid or payable per share
Declaration Date		Aug. 03, 2012
Record Date		Sep. 10, 2012
Date Paid		Oct. 01, 2012
Dividend per Share, preferred stock		$ 0.3875

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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

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+ 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

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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