Business Combinations (Schedule Of Preliminary Allocation Of The Purchase Price) (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended
	Oct. 26, 2011 Y
Business Acquisition [Line Items]
Goodwill	19,400
Maximum [Member]
Business Acquisition [Line Items]
Acquired intangible assets, Life (in years)	7
Minimum [Member]
Business Acquisition [Line Items]
Acquired intangible assets, Life (in years)	3
Preliminary Allocation [Member]
Business Acquisition [Line Items]
Accounts receivable	835
Property and equipment	112
Other assets	125
Acquired intangible assets	4,910
Deferred taxes	(1,814)
Goodwill	24,842
Accounts payable and other liabilities	(2,471)
Deferred revenue	(3,639)
Net cash paid	22,900
Final Allocation [Member]
Business Acquisition [Line Items]
Accounts receivable	835
Property and equipment	112
Other assets	125
Acquired intangible assets	4,910
Deferred taxes	4,033
Goodwill	19,427
Accounts payable and other liabilities	(2,903)
Deferred revenue	(3,639)
Net cash paid	22,900