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Asset Liquidation Investments and Other Investments (Narrative) (Details) (USD $) In Thousands, unless otherwise specified |  |  |  |  |  |  |  | 9 Months Ended |  | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 Knight's Bridge Capital Partners Internet Fund No. 1 GP LLC [Member] | Dec. 31, 2012 Knight's Bridge Capital Partners Internet Fund No. 1 GP LLC [Member] | Dec. 31, 2007 Knight's Bridge Capital Partners Internet Fund No. 1 GP LLC [Member] | Sep. 30, 2013 Polaroid Corporation [Member] | Dec. 31, 2012 Polaroid Corporation [Member] | Sep. 30, 2013 Polaroid Corporation [Member] Class A [Member] | Dec. 31, 2012 Polaroid Corporation [Member] Class A [Member] | Sep. 30, 2013 Polaroid Corporation [Member] Class D [Member] | Dec. 31, 2012 Polaroid Corporation [Member] Class D [Member] | Jun. 30, 2009 Polaroid [Member]
Equity Method Investment, Ownership Percentage |  |  |  |  | 33.33% |  |  |  |  |  |  | 5.00%
Non-Asset Liquidation Equity Investment Acquired |  |  |  |  | $ 20 | $ 3,109 | $ 3,053 | $ 2,492 | $ 2,447 | $ 617 | $ 606 |
Net investment at balance sheet date | 1,757 | 2,426 | 20 | 20 |  | 1,737 | 2,406 | 1,392 | 1,930 | 345 | 476 |
Management Fee Percentage |  |  |  |  |  |  |  |  |  | 2.00% |  |
Annual Management Fees on Investment |  |  |  |  |  |  |  | $ 40 |  | $ 11 |  |
Preferred Return on Investment |  |  |  |  |  |  |  | 8.00% |  | 10.00% |  |
Managing Partner, Carried Interest |  |  |  |  |  |  |  | 20.00% |  | 20.00% |  |

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- Definition The percentage of carried interest available to the Managing Partner after return of all capital contributed by the investors and payment of preferred return to the investors. + References No definition available. + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570 + Details
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