Commitments and Contingencies - Office Lease (Details) $ in Thousands		Aug. 24, 2015 USD ($) ft²	Apr. 29, 2014 USD ($) ft²	Apr. 30, 2016 USD ($)	May. 13, 2014 USD ($)
Operating Leased Assets [Line Items]
Financing lease obligation				$ 90,701
Base rent obligation	[1]			$ 172,580
500 Santana Row, San Jose, CA
Operating Leased Assets [Line Items]
Area of Real Estate Property | ft²		235,000
Term of office lease		10 years 9 months
Base rent obligation		$ 120,500
270 Brannan Street, San Francisco, CA
Operating Leased Assets [Line Items]
Area of Real Estate Property | ft²			182,000
Term of office lease			84 months
Financing lease obligation			$ 92,000
Amount to be Maintained in Letter of Credit as Security for Lease Agreement					$ 6,000

[1] $1.8 million from these agreements has been included as an offset to our future minimum rental payments.