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Acquisitions - Intangible Assets Related to Acquisition (Detail) (USD $) In Thousands, unless otherwise specified |  |  | 6 Months Ended |  |  | 6 Months Ended
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Jun. 30, 2013 | Dec. 31, 2012 | Jun. 30, 2013 PPC Broadband Inc [Member] | Dec. 10, 2012 PPC Broadband Inc [Member] | Jun. 30, 2013 PPC Broadband Inc [Member] In-process research and development [Member] | Jun. 30, 2013 PPC Broadband Inc [Member] Trademarks [Member] | Jun. 30, 2013 PPC Broadband Inc [Member] Developed technologies [Member] | Jun. 30, 2013 PPC Broadband Inc [Member] Customer relationships [Member] | Jun. 30, 2013 PPC Broadband Inc [Member] Backlog [Member]
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |
Intangible assets subject to amortization |  |  | $ 132,500 |  |  |  | $ 76,000 | $ 55,000 | $ 1,500
Goodwill | 772,014 | 778,708 | 277,005 | 277,005 |  |  |  |  |
Weighted average amortization period |  |  | 11 years 2 months 12 days |  |  |  | 5 years | 20 years | 6 months
Intangible assets not subject to amortization |  |  | 309,005 |  | 5,000 | 27,000 |  |  |
Total assets |  |  | $ 441,505 | $ 549,453 |  |  |  |  |

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- Definition Amount of assets acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition Amount of assets, excluding financial assets and goodwill, that lack physical substance, having a projected indefinite period of benefit, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=25498275&loc=d3e2207-128464 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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