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Equity - Anti-takeover Measures and Restrictions on Transfer (Details) (USD $) | Dec. 31, 2012 | Dec. 31, 2011 | Jul. 18, 2007
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Equity: |  |  |
Number of rights granted per share of common stock owned |  |  | 1
Ownership interest limit for anti-takeover measure |  |  | 15.00%
Preferred stock, par value (USD per share) | $ 0.01 | $ 0.01 |
Series A Junior Preferred Preferred Stock |  |  |
Equity: |  |  |
Number of securities called by right |  |  | 0.001
Preferred stock, par value (USD per share) |  |  | 0.01

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- Definition Shareholders' Equity, Ownership Interest Limit to Initate Anti-takeover Measure + References No definition available. + Details
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- Definition The specified number of securities that each class of warrants or rights outstanding give the holder the right but not the obligation to purchase from the issuer at a specific price, on or before a certain date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(2)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Subparagraph 2 -Article 4 + Details
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