COMMITMENTS AND CONTINGENCIES

Lease Commitments

We lease certain of our facilities and some of our equipment under non-cancellable operating lease arrangements that expire at various dates through 2031. We also have one land lease that expires in 2091. Rent expense includes base contractual rent and variable costs such as building expenses, utilities, taxes, insurance and equipment rental. Rent expense for these leases was approximately $137.2 million in fiscal 2018, $115.4 million in fiscal 2017, and $92.9 million in fiscal 2016. Our sublease income was immaterial for all periods presented.

We occupy three office buildings in San Jose, California where our corporate headquarters are located. We reference these office buildings as the Almaden, East and West Towers.

In March 2017, we exercised our option to purchase the Almaden Tower for a total purchase price of $103.6 million. Upon purchase, our investment in the lease receivable of $80.4 million was credited against the total purchase price. We capitalized the Almaden Tower as property and equipment on our Consolidated Balance Sheets at $104.2 million, the lesser of cost or fair value, which represented the total purchase price plus other direct costs associated with the purchase. As of November 30, 2018, we own the buildings and the underlying land that make up our corporate headquarters in San Jose, California, including the Almaden Tower.

Unconditional Purchase Obligations

Our purchase obligations consist of agreements to purchase goods and services entered into in the ordinary course of business. The following table summarizes our non-cancellable unconditional purchase obligations and operating leases for each of the next five years and thereafter as of November 30, 2018 (in thousands):



			Operating Leases
Fiscal Year	Purchase Obligations		Future Minimum Lease Payments		Future Minimum Sublease Income
2019	$	346,334	$	88,554	$	9,173
2020	172,883		93,509		8,981
2021	162,421		80,408		8,837
2022	20,866		71,425		6,451
2023	27,352		56,490		2,325
Thereafter	3,977		311,937		—
Total	$	733,833	$	702,323	$	35,767

Royalties

We have royalty commitments associated with the licensing of certain offerings and products. Royalty expense is generally based on a dollar amount per unit or a percentage of the underlying revenue. Royalty expense, which was recorded under our cost of revenue on our Consolidated Statements of Income, was approximately $119.1 million, $100.9 million and $79.8 million in fiscal 2018, 2017 and 2016, respectively.

Indemnifications

In the ordinary course of business, we provide indemnifications of varying scope to customers against claims of intellectual property infringement made by third parties arising from the use of our products and from time to time, we are subject to claims by our customers under these indemnification provisions. Historically, costs related to these indemnification provisions have not been significant and we are unable to estimate the maximum potential impact of these indemnification provisions on our future results of operations.

To the extent permitted under Delaware law, we have agreements whereby we indemnify our officers and directors for certain events or occurrences while the officer or director is or was serving at our request in such capacity. The indemnification period covers all pertinent events and occurrences during the officer’s or director’s lifetime. The maximum potential amount of future payments we could be required to make under these indemnification agreements is unlimited; however, we have director and officer insurance coverage that reduces our exposure and enables us to recover a portion of any future amounts paid. We believe the estimated fair value of these indemnification agreements in excess of applicable insurance coverage is minimal.

Legal Proceedings

In connection with disputes relating to the validity or alleged infringement of third-party intellectual property rights, including patent rights, we have been, are currently and may in the future be subject to claims, negotiations or complex, protracted litigation. Intellectual property disputes and litigation may be very costly and can be disruptive to our business operations by diverting the attention and energies of management and key technical personnel. Although we have successfully defended or resolved past litigation and disputes, we may not prevail in any ongoing or future litigation and disputes. Third-party intellectual property disputes could subject us to significant liabilities, require us to enter into royalty and licensing arrangements on unfavorable terms, prevent us from licensing certain of our products or offering certain of our services, subject us to injunctions restricting our sale of products or services, cause severe disruptions to our operations or the markets in which we compete, or require us to satisfy indemnification commitments with our customers including contractual provisions under various license arrangements and service agreements.

In addition to intellectual property disputes, we are subject to legal proceedings, claims and investigations in the ordinary course of business, including claims relating to commercial, employment and other matters. Some of these disputes and legal proceedings may include speculative claims for substantial or indeterminate amounts of damages. We consider all claims on a quarterly basis in accordance with GAAP and based on known facts assess whether potential losses are considered reasonably possible, probable and estimable. Based upon this assessment, we then evaluate disclosure requirements and whether to accrue for such claims in our financial statements. This determination is then reviewed and discussed with our Audit Committee and our independent registered public accounting firm.

We make a provision for a liability when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. These provisions are reviewed at least quarterly and adjusted to reflect the impacts of negotiations, settlements, rulings, advice of legal counsel and other information and events pertaining to a particular case. Unless otherwise specifically disclosed in this note, we have determined that no provision for liability nor disclosure is required related to any claim against us because: (a) there is not a reasonable possibility that a loss exceeding amounts already recognized (if any) may be incurred with respect to such claim; (b) a reasonably possible loss or range of loss cannot be estimated; or (c) such estimate is immaterial.

All legal costs associated with litigation are expensed as incurred. Litigation is inherently unpredictable. However, we believe that we have valid defenses with respect to the legal matters pending against us. It is possible, nevertheless, that our consolidated financial position, cash flows or results of operations could be negatively affected by an unfavorable resolution of one or more of such proceedings, claims or investigations.

In connection with our anti-piracy efforts, conducted both internally and through organizations such as the Business Software Alliance, from time to time we undertake litigation against alleged copyright infringers. Such lawsuits may lead to counter-claims alleging improper use of litigation or violation of other laws. We believe we have valid defenses with respect to such counter-claims; however, it is possible that our consolidated financial position, cash flows or results of operations could be negatively affected in any particular period by the resolution of one or more of these counter-claims.