Commitments and Contingencies - Legal Proceedings - Narrative (Details) (Pending Litigation [Member])	Apr. 02, 2012 lawsuits_filed	Feb. 29, 2012 lawsuits_filed	Feb. 24, 2012 lawsuits_filed	Feb. 13, 2012 lawsuits_filed	Jan. 27, 2012 lawsuits_filed	Jan. 13, 2012 lawsuits_filed	May 02, 2012 lawsuits_filed	Feb. 09, 2012 lawsuits_filed	Nov. 23, 2011 lawsuits_filed
United States District Court for the Northern District of California [Member]
Loss Contingencies [Line Items]
Shareholder suits	1	1	1	1	1	1
Superior Court of California, Santa Clara County [Member]
Loss Contingencies [Line Items]
Shareholder suits							1	1	1