Quarterly report pursuant to Section 13 or 15(d)

Summary of Changes in Investment in RealD (Detail)

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Summary of Changes in Investment in RealD (Detail) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Schedule of Equity Method Investments [Line Items]  
Investment in marketable securities - RealD, Beginning Balance $ 10,443
Unrealized holding gain 1,015
Investment in marketable securities - RealD, Ending Balance $ 11,458