Commitments and Contingencies Lease Commitments The Company leases office facilities and equipment for various terms under long-term, non-cancellable operating lease agreements. The leases expire at various dates through 2028 and provide for renewal options. The agreements generally require the Company to pay for executory costs such as real estate taxes, insurance, and repairs. In connection with our 2016 acquisitions, the Company assumed non-cancellable operating leases for equipment and office space. Office leases assumed include locations in Costa Mesa, California; Tampa, Florida; Ann Arbor, Michigan; and Bloomington, Minnesota. The office leases expire at various dates through 2020 and have terms substantially similar to our other office leasing arrangements. Equipment leases assumed by the Company include leases for equipment used in the general operation of the business and have lease terms expiring through 2020 . These agreements have terms substantially similar to our other equipment leasing arrangements. In May 2015 , the Company entered into a lease agreement for office space located in Richardson, Texas to serve as our new corporate headquarters and data center. The lease is for a term of twelve years , beginning in 2016, and includes optional extension periods. The lease agreement contains provisions for rent escalations over the term of the lease and leasehold improvement incentives. In July 2015 , the Company entered into an amendment to the lease agreement which increased the amount of leased space. The lease was again amended in July 2016 , which permitted an increase in our tenant improvement allowance. We completed the move of our corporate headquarters and data center to this new facility in the third quarter of 2016. Our lease for our previous corporate headquarters expired in December 2016. At December31, 2016 and 2015 , we had a receivable for incentives under this lease of zero and $19.4 million , respectively. The decrease in the lease incentives receivable balance between the periods is