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Revenue from Contracts with Customers
 12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Revenue from Contracts with Customers Revenue from Contracts with Customers
The Company sells its services through a sales force located both domestically and abroad. Revenue derived from operations outside of the U.S. is determined based on the country in which the sale originated. Other than the U.S., no single country accounted for 10% or more of the Company’s total revenue for any reported period. The following table summarizes revenue by geography included in the Company’s consolidated statements of income for the years ended December 31, 2021, 2020 and 2019 (in thousands):

202120202019
U.S.$1,837,508 $1,777,435 $1,694,211 
International1,623,715 1,420,714 1,199,406 
Total revenue$3,461,223 $3,198,149 $2,893,617 

Leveraging its Intelligent Edge Platform and a global sales organization, the Company offers solutions that are developed and maintained through two groups: the Security Technology Group and the Edge Technology Group. The Security Technology Group includes solutions that are designed to protect business online by keeping infrastructure, websites, applications and users safe, while the Edge Technology Group includes solutions that are designed to enable business online, including media delivery, web performance and edge computing solutions. The following table summarizes revenue by product group included in the Company’s consolidated statements of income for the years ended December 31, 2021, 2020 and 2019 (in thousands):

202120202019
Security Technology Group$1,334,836 $1,061,622 $848,733 
Edge Technology Group2,126,387 2,136,527 2,044,884 
Total revenue$3,461,223 $3,198,149 $2,893,617 

Most security and content delivery services represent obligations that are satisfied over time as the customer simultaneously receives and consumes the services provided by the Company. Accordingly, the majority of the Company's revenue is recognized over time, generally ratably over the term of the arrangement due to consistent monthly traffic commitments that expire each period. A small percentage of the Company's contracts are satisfied at a point in time, such as one-time professional services contracts, integration services and most license sales where the primary obligation is delivery of the license at the start of the term. In these cases, revenue is recognized at a point in time of delivery or satisfaction of the performance obligation.

During the years ended December 31, 2021, 2020 and 2019, the Company recognized $78.8 million, $69.9 million and $64.1 million of revenue that was included in deferred revenue as of December 31, 2020, 2019 and 2018 respectively.
As of December 31, 2021, the aggregate amount of remaining performance obligations from contracts with customers was $3.1 billion. The Company expects to recognize approximately 70% of its remaining performance obligations as revenue over the next 12 months, with the remaining recognized thereafter. Remaining performance obligations represent the amount of the transaction price under contracts with customers that are attributable to performance obligations that are unsatisfied or partially satisfied at the reporting date. This consists of future committed revenue for monthly, quarterly or annual periods within current contracts with customers, as well as deferred revenue arising from consideration invoiced in prior periods for which the related performance obligations have not been satisfied. It excludes estimates of variable consideration such as usage-based contracts with no committed contract as well as anticipated renewed contracts. Revenue recognized during the years ended December 31, 2021, 2020 and 2019, related to performance obligations satisfied in previous periods was not material.