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Consolidated Statement Of Changes In Shareholders' Equity (Parenthetical) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Common stock dividends per share, declared	$ 0.57	$ 0.55
Series A 3% Preferred Stock [Member]
Preferred stock dividends per share, declared	$ 2.25	$ 2.25
Preferred stock, dividend percentage	3.00%	3.00%
Series B-1 8.48% Preferred Stock [Member]
Preferred stock dividends per share, declared	$ 6.36	$ 6.36
Preferred stock, dividend percentage	8.48%	8.48%

X

- 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

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X

- Definition

The percentage rate used to calculate dividend payments on preferred stock.

+ References

No definition available.

+ Details

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X

- Definition

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

+ References

No definition available.

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