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Dividend Distributions (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Class of Stock [Line Items]
Total Dividend	$ 4,725	$ 4,928	$ 14,285	$ 14,802
Series F Preferred Stock [Member]
Class of Stock [Line Items]
Dividend/Distribution per Share			$ 4,105.28
Total Dividend			2,053
Series G Preferred Stock [Member]
Class of Stock [Line Items]
Dividend/Distribution per Share			$ 5,427.00
Total Dividend			1,357
Series J Preferred Stock [Member]
Class of Stock [Line Items]
Dividend/Distribution per Share			$ 13,593.90
Total Dividend			8,156
Series K Preferred Stock [Member]
Class of Stock [Line Items]
Dividend/Distribution per Share			$ 13,593.90
Total Dividend			$ 2,719

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- Definition

Equity impact of aggregate cash, stock, and paid-in-kind dividends declared for preferred shareholders during the period.

+ References

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

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 01-6

-Paragraph 14

-Subparagraph l

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



Reference 3: 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



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 405

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817

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- Definition

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

+ References

No definition available.

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