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Acquisitions - Intangible Assets Related to Acquisition (Detail) (USD $) In Thousands, unless otherwise specified |  |  | 0 Months Ended |  | 0 Months Ended |  | 0 Months Ended |  | 0 Months Ended |  | 0 Months Ended |  | 0 Months Ended
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Jun. 29, 2014 | Dec. 31, 2013 | Mar. 31, 2014 Grass Valley [Member] | Mar. 31, 2014 Grass Valley [Member] | Mar. 31, 2014 Grass Valley [Member] Trademarks [Member] | Mar. 31, 2014 Grass Valley [Member] In-process research and development [Member] | Mar. 31, 2014 Grass Valley [Member] Customer relationships [Member] | Mar. 31, 2014 Grass Valley [Member] Customer relationships [Member] | Mar. 31, 2014 Grass Valley [Member] Developed technologies [Member] | Mar. 31, 2014 Grass Valley [Member] Developed technologies [Member] | Mar. 31, 2014 Grass Valley [Member] Backlog [Member] | Mar. 31, 2014 Grass Valley [Member] Backlog [Member] | Jun. 11, 2014 Prosoft Technology, Inc. [Member] | Jun. 11, 2014 Prosoft Technology, Inc. [Member] Trademarks [Member] | Jun. 11, 2014 Prosoft Technology, Inc. [Member] Customer relationships [Member] | Jun. 11, 2014 Prosoft Technology, Inc. [Member] Developed technologies [Member] | Jun. 11, 2014 Prosoft Technology, Inc. [Member] Backlog [Member]
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets subject to amortization |  |  |  | $ 65,500 |  |  |  | $ 27,000 |  | $ 37,000 |  | $ 1,500 | $ 32,400 |  | $ 22,000 | $ 10,000 | $ 400
Goodwill | 934,285 | 773,048 |  | 106,176 |  |  |  |  |  |  |  |  | 55,281 |  |  |  |
Intangible assets not subject to amortization |  |  |  | 136,176 | 22,000 | 8,000 |  |  |  |  |  |  | 60,281 | 5,000 |  |  |
Total intangible assets |  |  |  | $ 201,676 |  |  |  |  |  |  |  |  | $ 92,681 |  |  |  |
Weighted average amortization period |  |  | 9 years |  |  |  | 15 years |  | 5 years |  | 3 months 18 days |  | 8 years |  | 10 years | 4 years | 3 months 18 days

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + 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=39739317&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=39739317&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=35744172&loc=d3e2207-128464 + 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=35741047&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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- Definition Carrying amount of finite-lived intangible assets, indefinite-lived intangible assets and goodwill. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Intangible assets are assets, not including financial assets, lacking physical substance. + References No definition available. + Details
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