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Investment in Marketable Securities - RealD (Details) (USD $) In Thousands, except Share data | 1 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2011 | Sep. 30, 2011 | Dec. 31, 2010
Investment in Company Three (Textual) [Abstract] |  |  |
Number of options to purchase common stock |  |  | 1,085,828
Exercise price of options | $ 0.00667 |  |
Investment in RealD through options |  |  | $ 18,909
Additional options earned to purchase common stock of RealD |  | 136,952 |
Approximate increase in investment in RealD and its deferred lease incentive liability |  | 3,402 |
Number of shares owned in RealD |  | 1,222,780 |
Estimated fair value of company owned shares in RealD |  | 11,433 |
Unrealized holding gain |  | $ 19,970 |

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- Definition This item represents the cost of equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments for other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + Details
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- Definition Total debt and equity financial instruments including: (1) securities held-to-maturity and (2) securities available-for-sale that will be held for the long-term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 17 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562 + Details
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