Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies - Additional Information (Detail)

v2.4.0.6
Significant Accounting Policies - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2012
kW
Dec. 31, 2011
Dec. 31, 2010
Significant Accounting Policies [Line Items]      
Allowance for doubtful accounts $ 700,000 $ 900,000  
Estimated value of obsolete or slow-moving inventory 1,600,000 900,000  
Advertising expense 25,500,000 27,200,000 37,700,000
Accumulated amortization of media library 30,100,000 27,500,000  
Royalty payment expected to be incurred in 2013 10,000,000    
Amortization Expense 7,130,000 3,497,000 4,552,000
Amortization expense 3,500,000 400,000  
Estimated amortization expense of intangible assets for year 2013 2,700,000    
Estimated amortization expense of intangible assets for year 2014 1,600,000    
Estimated amortization expense of intangible assets for year 2015 900,000    
Estimated amortization expense of intangible assets for year 2016 300,000    
Media library estimated amortization expense year 1 700,000    
Media library estimated amortization expense year 2 700,000    
Media library estimated amortization expense year 3 700,000    
Media library estimated amortization expense year 4 700,000    
Media library estimated amortization expense year 5 700,000    
Estimated amortization expense of intangible assets thereafter 100,000    
Revenue recognition less than kilowatt completed contract 100    
Revenue recognition greater than kilowatt percentage of completion 100    
Defined contribution plan percentage employee's matching contribution 50.00%    
Defined contribution plan maximum annual matching contribution amount 1,500    
Common stock shares excluded from computation of dilutive earnings per share 1,387,000 1,306,000 416,000
Minimum
      
Significant Accounting Policies [Line Items]      
Estimated useful life of property and equipment 3 years    
Percentage of investments in limited liability companies required for accounting by equity method 5.00%    
Percentage of investments in corporations required for accounting by equity method 20.00%    
Estimated useful life of media library 5 years    
Estimated useful life 24 months    
Maximum
      
Significant Accounting Policies [Line Items]      
Estimated useful life of property and equipment 45 years    
Estimated useful life of media library 15 years    
Period for gross revenues from all sources to be earned 7 years    
Estimated useful life 84 months    
Defined Contribution Pension Plan 401k
      
Significant Accounting Policies [Line Items]      
Defined contribution plan maximum annual matching contribution amount, 401(K) 200,000    
Media Titles and Rights
      
Significant Accounting Policies [Line Items]      
Unamortized In Production Original Television Program Costs 3,600,000    
Amortization expense 1,500,000 1,900,000 1,300,000
Estimated amortization expense 2,600,000    
Estimated amortization expense of intangible assets for year 2013 2,600,000    
Estimated amortization expense of intangible assets for year 2014 2,600,000    
Estimated amortization expense of intangible assets for year 2015 2,600,000    
Estimated amortization expense of intangible assets for year 2016 2,600,000    
Estimated amortization expense of intangible assets for year 2017 2,600,000    
Media Titles and Rights | Minimum
      
Significant Accounting Policies [Line Items]      
Estimated useful life 12 months    
Media Titles and Rights | Maximum
      
Significant Accounting Policies [Line Items]      
Estimated useful life 84 months    
Website development costs and other software
      
Significant Accounting Policies [Line Items]      
Estimated useful life of property and equipment 3 years    
Released Titles
      
Significant Accounting Policies [Line Items]      
Capitalized production cost 1,200,000    
Expected amortization of capitalized production costs in 2013 5,100,000    
Percentage of expected amortization of capitalized production costs in 2013 54.50%    
Percentage of expected amortization of capitalized production costs next three years 86.10%    
Unreleased Titles
      
Significant Accounting Policies [Line Items]      
Capitalized production cost 100,000    
Media Content
      
Significant Accounting Policies [Line Items]      
Accumulated amortization for produced media content 16,200,000 15,000,000  
Amortization Expense $ 1,200,000 $ 1,200,000 $ 1,700,000
Target and Wal Mart
      
Significant Accounting Policies [Line Items]      
Percentage of account receivable by major customer 47.60%    
Number of major customers 2