Revenue

We generate revenues principally from subscriptions and advertising. Subscription revenues consist of revenues from subscriptions to our print and digital products (which include our news product, as well as our Crossword and Cooking products) and single-copy and bulk sales of our print products. Subscription revenues are based on both the number of copies of the printed newspaper sold and digital-only subscriptions, and the rates charged to the respective customers.

Advertising revenues are derived from the sale of our advertising products and services on our print and digital platforms. These revenues are primarily determined by the volume, rate and mix of advertisements.

Other revenues primarily consist of revenues from licensing, affiliate referrals (revenue generated by offering direct links to merchants in exchange for a portion of the sale price), building rental revenue, commercial printing, NYT Live (our live events business) and retail commerce.

Subscription, advertising and other revenues were as follows:



	Years Ended
(In thousands)	December 30, 2018		December 31, 2017		December 25, 2016
	(52 weeks)		(53 weeks)		(52 weeks)
Subscription	$	1,042,571	$	1,008,431	$	880,543
Advertising	558,253		558,513		580,732
Other ⁽¹⁾	147,774		108,695		94,067
Total	$	1,748,598	$	1,675,639	$	1,555,342

⁽¹⁾ Other revenue includes building rental revenue, which is not under the scope of Topic 606. Building rental revenue was approximately $23 million for the year ended December 30, 2018 and approximately $17 million for the years ended December 31, 2017 and December 25, 2016.

The following table summarizes digital-only subscription revenues, which are a component of subscription revenues above, for the years ended December 30, 2018, December 31, 2017 and December 25, 2016:



	Years Ended
(In thousands)	December 30, 2018		December 31, 2017		December 25, 2016
	(52 weeks)		(53 weeks)		(52 weeks)
Digital-only subscription revenues:
News product subscription revenues⁽¹⁾	$	378,484	$	325,956	223,459
Other product subscription revenues⁽²⁾	22,136		14,387		9,369
Total digital-only subscription revenues	$	400,620	$	340,343	232,828
⁽¹⁾Includes revenues from subscriptions to the Company’s news product. News product subscription packages that include access to the Company’s Crossword and Cooking products are also included in this category.
⁽²⁾Includes revenues from standalone subscriptions to the Company’s Crossword and Cooking products.

Advertising revenues (print and digital) by category were as follows:



	Years Ended
	December 30, 2018						December 31, 2017						December 25, 2016
	(52 weeks)						(53 weeks)						(52 weeks)
(In thousands)	Print		Digital		Total		Print		Digital		Total		Print		Digital		Total
Display	$	269,160	$	202,038	$	471,198	$	285,679	$	198,658	$	484,337	$	335,652	$	181,545	$	517,197
Other	30,220		56,835		87,055		34,543		39,633		74,176		36,328		27,207		63,535
Total advertising	$	299,380	$	258,873	$	558,253	$	320,222	$	238,291	$	558,513	$	371,980	$	208,752	$	580,732

Performance Obligations

Revenue is recognized when a performance obligation is satisfied by transferring a promised good or service to a customer. In the case of our digital archive licensing contracts, the transaction price was allocated among the performance obligations, (i) the archival content and (ii) the updated content, based on the Company’s estimate of the standalone selling price of each of the performance obligations, as they are currently not sold separately.

As of December 30, 2018, the aggregate amount of the transaction price allocated to the remaining performance obligations was approximately $27 million. The Company will recognize this revenue as control of the performance obligation is transferred to the customer. We expect that approximately $12 million, $12 million, $2 million and $1 million will be recognized in 2019, 2020, 2021 and 2022, respectively.

Contract Assets

As of December 30, 2018, the Company had $2.5 million in contract assets recorded in the Consolidated Balance Sheet related to digital archiving licensing revenue. The contract asset is reclassified to “Accounts receivable” when the customer is invoiced based on the contractual billing schedule. The increase in the contract assets balance for the year ended December 30, 2018, is primarily driven by the cumulative catch-up adjustment recorded by the Company on January 1, 2018, of $3.5 million as a result of adoption of Topic 606, offset by $1.0 million of consideration that was reclassified to “Accounts receivable” when invoiced based on the contractual billing schedules for the period ended December 30, 2018.

Significant Judgments

Our contracts with customers sometimes include promises to transfer multiple products and services to a customer. Determining whether products and services are considered distinct performance obligations that should be accounted for separately versus together may require significant judgment. We use an observable price to determine the standalone selling price for separate performance obligations if available or, when not available, an estimate that maximizes the use of observable inputs and faithfully depicts the selling price of the promised goods or services if we sold those goods or services separately to a similar customer in similar circumstances.

Practical Expedients and Exemptions

We expense the cost to obtain or fulfill a contract as incurred because the amortization period of the asset that the entity otherwise would have recognized is one year or less. We also apply the practical expedient for the significant financing component when the difference between the payment and the transfer of the products and services is a year or less.