Commitments and Contingencies Lease Obligations In December 2004, the Company relocated its corporate headquarters within Redwood City, California and entered into a new lease agreement for two buildings at 100 and 200 Cardinal Way. The initial lease term was from December 15, 2004 to December 31, 2007 with a three -year option to renew to December 31, 2010 at fair market value. In May 2007, the Company exercised its renewal option to extend the office lease term to December 31, 2010. In May 2009, the Company executed the lease amendment to further extend the lease term for another three years to December 31, 2013. The future minimum contractual lease payment is $1.8 million for the remainder of 2013. In February 2000, the Company entered into lease agreements for two office buildings located at 2000 and 2100 Seaport Boulevard in Redwood City, California, which the Company occupied from August 2001 through December 2004 as its former corporate headquarters. These lease agreements expire in July 2013. As a result of the 2004 Restructuring Plan, the Company relocated the corporate headquarters and subsequently entered into a series of sublease agreements with tenants to occupy a majority of the vacated space. The majority of the subleases expired in June and July 2013. In February 2012, the Company purchased the property associated with its former corporate headquarters in Redwood City, California for approximately $148.6 million in cash, which reflects a purchase price of $153.2 million less a rent credit of $4.6 million . As a result of the transaction, the Company no longer has any further commitments relating to the original lease agreements. The Company leases certain office facilities under various non-cancelable operating leases, which expire at various dates through 2021 and require the Company to pay operating costs, including property taxes, insurance, and maintenance. Future minimum lease payments as of June 30, 2013 under non-cancelable operating leases with original terms in excess of one year are summ