Omneon Acquisition (Details) (USD $) In Thousands	Sep. 15, 2010
Existing Technology [Member] | Omneon [Member]
Intangible assets:
Total Intangible Assets	$ 50,800
Trademarks and tradenames [Member] | Omneon [Member]
Intangible assets:
Total Intangible Assets	4,000
Patents/Core Technology [Member] | Omneon [Member]
Intangible assets:
Total Intangible Assets	9,800
Customer contracts and related relationships [Member] | Omneon [Member]
Intangible assets:
Total Intangible Assets	29,200
Maintenance agreements and related relationships [Member] | Omneon [Member]
Intangible assets:
Total Intangible Assets	5,500
In-process Technology [Member]
Intangible assets:
Total Intangible Assets	9,000
Order backlog [Member] | Omneon [Member]
Intangible assets:
Total Intangible Assets	800
Omneon [Member]
Summarized purchase price for acquisitions
Cash acquired	40,485
Accounts receivable (Gross amount due from accounts receivable of $17,760)	17,055
Inventory	11,010
Fixed assets	12,093
Deferred income tax assets	18,021
Other tangible assets acquired	3,294
Intangible assets:
Total Intangible Assets	109,100
Goodwill	147,750
Total assets acquired	358,808
Accounts payable	(6,829)
Deferred revenue	(6,399)
Deferred income tax liabilities	(42,575)
Other accrued liabilities	(11,203)
Net assets acquired	291,802
Less: cash acquired	(40,485)
Net purchase price	$ 251,317