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Discontinued Operations - Recorded Gain With the Sale of Cable Access HFC Business (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |  | 1 Months Ended | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 HFC business [Member] | Dec. 31, 2012 HFC business [Member] | Dec. 31, 2011 HFC business [Member] | Mar. 29, 2013 HFC business [Member] | Mar. 05, 2013 Aurora [Member] HFC business [Member] | Dec. 31, 2013 Aurora [Member] HFC business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |
Gross Proceeds |  |  |  |  |  |  |  | $ 46,000 |
Inventories, net |  |  |  | 10,579 |  |  |  |  |
Prepaid expenses and other current assets |  |  |  | 612 |  |  |  |  |
Property and equipment, net |  |  |  | 1,194 |  |  |  |  |
Goodwill de-recognized | 14,547 | 0 |  | 14,547 |  |  | 14,500 |  |
Deferred revenue |  |  |  | (4,499) |  |  |  |  |
Accrued liabilities |  |  |  | (939) |  |  |  |  |
Total net assets sold and de-recognized |  |  |  | 21,494 |  |  |  |  |
Less : Selling cost |  |  |  | 2,485 |  |  |  |  |
Less : Tax effect |  |  |  | 7,358 |  |  |  |  |
Gain on disposal, net of taxes | $ 14,663 | $ 0 | $ 0 | $ 14,663 | $ 0 | $ 0 |  |  | $ 14,663

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- Definition Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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