Commitments and Contingencies (Textual) (Details) (USD $) In Thousands, unless otherwise specified		12 Months Ended			3 Months Ended
	Mar. 31, 2014	Dec. 31, 2012 Fifth Amendment [Member]	Mar. 31, 2014 Sixth Amendment [Member]	Mar. 31, 2014 Headquarters, Redwood City [Member] Fifth Amendment [Member] sqft	Mar. 31, 2014 Penobscot Space, Building 2 Space, and Saginaw Space [Member] Fifth Amendment [Member]	Mar. 31, 2014 Chesapeake Space [Member]	Mar. 31, 2012 Singapore [Member]	Dec. 31, 2012 Singapore [Member]
Commitments and Contingencies [Line Items]
Lease area space occupancy (square feet)				107,000
Expiration date of lease					Jan. 31, 2020	Jan. 31, 2017
Payments for Capital Improvements		$ 3,600
Tenant Reimbursements		3,100
Incentive from Lessor	2,054
Operating Leases, Future Minimum Payments Due	16,043							354
Operating Leases Term							6 months
Letters of credit			707
Asset retirement obligations	109
Estimated obligation payable	$ 600