Acquisitions (Schedule of Purchase Price Allocation) (Details) (Vyatta, USD $) In Thousands, unless otherwise specified	Nov. 09, 2012
Business Acquisition, Purchase Price Allocation
Cash	$ 140
Accounts receivable	511
Identifiable Intangible Assets	25,320
Goodwill	25,373	[1]
Other assets	1,017
Total assets acquired	52,361
Deferred tax liability	3,528
Deferred revenue	1,333
Accounts payable and other accrued liabilities	2,731
Total liabilities assumed	7,592
Net assets acquired	44,769
In-Process Technology
Business Acquisition, Purchase Price Allocation
Identifiable Intangible Assets	21,700
Customer Relationships
Business Acquisition, Purchase Price Allocation
Identifiable Intangible Assets	1,280
Core/Developed Technology
Business Acquisition, Purchase Price Allocation
Identifiable Intangible Assets	1,050
Non-Compete Agreements
Business Acquisition, Purchase Price Allocation
Identifiable Intangible Assets	830
Trade Name
Business Acquisition, Purchase Price Allocation
Identifiable Intangible Assets	$ 460

[1] None of the goodwill recognized is expected to be deductible for income tax purposes.