Annual report pursuant to Section 13 and 15(d)

Investment in RealD (Detail)

v2.4.0.6
Investment in RealD (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Schedule of Equity Method Investments [Line Items]      
Beginning Balance $ 9,709 $ 27,993  
Fair value of options earned   3,402 18,909
Exercise of options at $0.00667 per share   8  
Unrealized holding gain (loss) 3,998 (21,694) 9,084
Ending Balance $ 13,707 $ 9,709 $ 27,993