Acquisitions (Schedule Of Allocation Of Purchase Price) (Details) (LitePoint Corporation [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
LitePoint Corporation [Member]
Business Acquisition [Line Items]
Goodwill	$ 352,778
Other intangible assets	310,500
Cash, cash equivalents and short term marketable securities	61,250
Other current assets	72,109
Non-current assets In-process research and development	5,838
Accounts payable and current liabilities	(37,177)
Long-term deferred tax liabilities	(115,463)
Other long-term liabilities	(3,788)
Total purchase price	$ 646,047