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Stockholders' Equity (Details Textual) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |
Number of convertible preferred stock |  |  |  |  | 0 | 0 |
Preferred stock conversion factor |  |  |  |  |  | 5.00 |
Stockholders' Equity (Additional Textual) [Abstract] |  |  |  |  |  |  |
Wrong conversion factor |  |  |  |  |  |  | 1.25
Preferred stock conversion |  |  |  |  |  |  | 1,188,000
Additional issuance of shares to correct adjustment factor |  |  |  |  |  | 3,562 |
Dividend payment restrictions | 100.00% |  |  |  | 100.00% |  |
Received distributions from the earnings of subsidiaries |  |  |  |  | $ 40,200,000 | $ 89,300,000 | $ 30,500,000
Capital contributions to subsidiaries |  |  |  |  | 28,600,000 | 49,000,000 | 30,000,000
Series A [Member] |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |
Series A preferred stock pays a cumulative dividend | $ 0.25 | $ 0.25 | $ 0.25 | $ 0.25 |  |  |
Preferred stock aggregate dividends |  |  |  |  | 20,000 | 20,000 | 20,000
Preferred stock conversion factor | 2.50 |  |  |  | 2.50 | 2.50 |
Series M [Member] |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |
Preferred stock aggregate dividends |  |  |  |  | $ 267,000 |  |
Number of convertible preferred stock |  |  |  |  |  |  | 950
Preferred stock conversion factor | 5.00 |  |  |  | 5.00 | 5.00 |

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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AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 14 -Subparagraph l -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 + Details
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