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Shareholders' Equity (Schedule Of Dividends) (Details) - $ / shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Class of Stock [Line Items]
Common stock	$ 0.050	$ 0.050
Cumulative Redeemable Preferred Stock	$ 0.453	$ 0.453
Series B [Member]
Class of Stock [Line Items]
Dividend rate percentage	7.25%

X

- 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.

+ References

No definition available.

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Namespace Prefix:	us-gaap_
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Period Type:	duration

X

- Definition

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

+ References

Reference 1: 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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

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- Definition

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

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- Definition

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

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