he ordinary course of business, we enter into contractual agreements with third parties that include non-cancelable payment obligations, for which we are liable in future periods. These arrangements can include terms binding us to minimum payments and/or penalties if we terminate the agreement for any reason other than an event of default as described by the agreement. The following table presents a summary of our contractual obligations and commitments as of September 25, 2015 (in thousands):



	Payments Due By Fiscal Period
	Fiscal 2016		Fiscal 2017		Fiscal 2018		Fiscal 2019		Fiscal 2020		Thereafter		Total
Naming rights	$	7,525	$	7,619	$	7,715	$	7,811	$	7,909	$	102,980	$	141,559
Donation commitments	—		6,045		67		67		67		738		6,984
Operating leases	11,605		10,695		9,161		8,088		7,565		30,683		77,797
Purchase obligations	10,933		823		—		—		—		—		11,756
Total	$	30,063	$	25,182	$	16,943	$	15,966	$	15,541	$	134,401	$	238,096

Naming Rights. In fiscal 2012, we entered into an agreement for naming rights and related benefits with respect to the Dolby Theatre in Hollywood, California, the location of the Academy Awards. The term of the agreement is 20 years, over which we will make payments on a semi-annual basis. Our payment obligations are conditioned in part on the Academy Awards being held and broadcast from the Dolby Theatre.

Donation Commitments. During fiscal 2014, we entered into a non-cancelable obligation to donate and install imaging and audio products to the Museum of the Academy of Motion Picture Arts and Sciences in Los Angeles, California, and provide maintenance services for fifteen years from its expected opening date in 2017.

Operating Leases. Operating lease payments represent our commitments for future minimum rent made under non-cancellable leases for office space, including those payable to our principal stockholder and portions attributable to the controlling interests in our wholly owned subsidiaries. The following table summarizes information about our total rental expenses under operating leases, including the portion of this total rent expense which is payable to our principal stockholder (in thousands):



	Fiscal Year Ended
	September 25, 2015		September 26, 2014		September 27, 2013
Total rent expense	$	15,349	$	14,278	$	13,092
Rent expense payable to principal stockholder	3,136		2,125		1,375

Purchase Obligations. Purchase obligations primarily consist of our commitments made under agreements to purchase goods and services for purposes that include IT and telecommunications, marketing and professional services, and manufacturing and other R&D activities.

Indemnification Clauses. On a limited basis, our contractual agreements will contain a clause under which we have agreed to provide indemnification to the counterparty, most commonly to licensees in connection with licensing arrangements that include our intellectual property. Additionally, and although not a contractual requirement, we have at times elected to defend our licensees from third party intellectual property infringement claims. Since the terms and conditions of our contractual indemnification clauses do not explicitly specify our obligations, we are unable to reasonably estimate the maximum potential exposure for which we could be liable. Furthermore, we have not historically made any payments in connection with any such obligation and believe there to be a remote likelihood that any potential exposure in future periods would be of a material amount. As a result, no amounts have been accrued in our consolidated financial statements with respect to the contingent aspect of these indemnities.