Acquisitions and Acquisition-Related Contingent Consideration Acqusitions and Acquisition-Related Contingent Consideration (Details 1) (USD $) In Thousands, unless otherwise specified	Jul. 02, 2012
Sigrity [Member]
Business Acquisition Purchase Price Allocation [Line Items]
Cash and cash equivalents	$ 7,490
Trade receivables	4,254
Property, plant and equipment	238
Other assets	1,004
Goodwill	39,680
Total assets acquired	93,266
Deferred revenue	(3,800)
Other liabilities	(2,547)
Long-term deferred tax liabilities	(15,079)
Net assets acquired	71,840
Tradenames and trademarks (nine-year estimated useful lives) [Member]
Business Acquisition Purchase Price Allocation [Line Items]
Acquired intangibles	1,300
Agreements and relationships (three to ten-year estimated useful lives) [Member]
Business Acquisition Purchase Price Allocation [Line Items]
Acquired intangibles	17,100
Existing technology (four to ten-year estimated useful lives [Member]
Business Acquisition Purchase Price Allocation [Line Items]
Acquired intangibles	$ 22,200