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Significant Accounting Policies - Additional Information (Detail) (USD $) | 12 Months Ended
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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 |  |

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration