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Shareholders' Equity (Narrative) (Details) - $ / shares		3 Months Ended
	Apr. 19, 2016	Mar. 31, 2016	Dec. 31, 2015
Class of Stock [Line Items]
Dividends payable, date declared		Apr. 19, 2016
Dividends payable, date to be paid		May 20, 2016
Dividends payable, date of record		May 10, 2016
Series B [Member]
Class of Stock [Line Items]
Dividend rate percentage		7.25%
Liquidation preference, per share		$ 25.00	$ 25.00
Subsequent Event [Member]
Class of Stock [Line Items]
Common stock, dividends declared	$ 0.05
Subsequent Event [Member] | Series B [Member]
Class of Stock [Line Items]
Preferred stock dividends declared	$ 0.453125

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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 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
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-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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-Name Accounting Standards Codification
-Topic 230
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-Section 50
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The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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