Restructuring and Excess Facilities (Details Textual) (USD $) In Millions	9 Months Ended	3 Months Ended
	Sep. 30, 2011	Dec. 31, 2010 Omneon [Member] Selling, general and administrative expenses [Member]	Apr. 01, 2011 Selling, general and administrative expenses [Member]	Sep. 30, 2011 Accrued Liabilities Current [Member]
Restructuring and Excess Facilities (Textual) [Abstract]
Expenses related to business acquisition		$ 3.0
Expected sublease income			0.5
Accrued excess facilities cost	3.0			1.7
Additional Restructuring and Excess Facilities (Textual) [Abstract]
Lease payments, property taxes, insurance and other maintenance fees related to vacated facilities	1.4
Sublease income related to vacated facilities	$ 1.1