Commitments and Contingencies Leases The Company leases certain computer equipment and its corporate office and data center facilities under non-cancelable operating leases for varying periods through 2028. The following are the minimum annual lease payments due under operating leases at September 30, 2017 (in thousands): Remainder of 2017 $ 1,384 2018 5,927 2019 5,198 2020 4,873 2021 4,649 2022 and thereafter 26,136 Total minimum lease payments $ 48,167 Rent expense was $2.7 million and $1.8 million for the three months ended September 30, 2017 and 2016 , respectively, and $7.0 million and $5.3 million for the nine months ended September 30, 2017 and 2016 , respectively. Although certain of the operating lease agreements provide for rent free periods or escalating rent payments over the terms of the leases, rent expense under these agreements is recognized on a straight-line basis over the term of the lease, starting when the Company takes possession of the property from the landlord. We record t he difference between the recognized rent expense and the amounts payable under the lease as a short-term or long-term deferred rent liability. When we receive tenant allowances upon entering into certain leases, we record the allowances as short-term or long-term tenant allowance liability and amortize them using the straight-line method as a reduction to rent expense over the term of the lease. As of September 30, 2017 and December 31, 2016 , the Company had accrued $8.8 million and $0.4 million , respectively, of deferred rent related to these agreements, which is reflected in accrued liabilities and other non-current liabilities in the accompanying condensed consolidated balance sheets. On October 14, 2016, the Company entered into a lease agreement (included in the table above) for its new headquarter office facility. The lease payments commence on May 1, 2018 and the lease has a ten -year term through April 30, 2028. The total commitment of $38.6 million is payable monthly with escalating rental payments throughou