REVENUE

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Abstract]

REVENUE

3.             REVENUE

The following tables present our revenues disaggregated by revenue source (in thousands).

Sales and usage-based taxes are excluded from revenues. No sales to an individual customer or in a country other than the United States accounted for 10% or more of the sales for the periods listed on the following table. Revenue, classified by the major geographic areas in which our customers are located, was as follows:

Years ended December 31,	2020		2019		2018
(in thousands)
United States	$	2,006,368	$	1,862,698	$	1,677,116
Other Countries		154,852		152,779		144,449
Total Revenues	$	2,161,220	$	2,015,477	$	1,821,565

Revenue from external customers, classified by significant product and service offerings, was as follows:

Years ended December 31,	2020		2019		2018
(in thousands)
Residential revenue	$	977,470	$	861,636	$	773,932
Commercial revenue		766,716		770,342		707,386
Termite completions, bait monitoring and renewals		406,782		371,258		332,573
Other revenues		10,252		12,241		7,674
Total Revenues	$	2,161,220	$	2,015,477	$	1,821,565

Deferred revenue recognized for the year ended December 31, 2020 and 2019 was $173.2 million and $165.0 million, respectively. Changes in unearned revenue were as follows:

At December 31,	2020			2019
(in thousands)
Balance at beginning of year	$	136,507		$	127,075
Deferral of unearned revenue		185,943			174,404
Recognition of unearned revenue		(173,226	)		(164,972	)
Balance at December 31,	$	149,224		$	136,507

Revenue allocated to remaining performance obligations represents contracted revenue that has not yet been recognized (“contracted not recognized revenue”), which includes both unearned revenue and revenue that will be billed and recognized in future periods. The Company has no material contracted not recognized revenue as of December 31, 2020 or December 31, 2019.

At December 31, 2020 and December 31, 2019, the Company had long-term unearned revenue of $18.0 million and $13.7 million, respectively. Unearned short-term revenue is recognized over the next 12-month period. The majority of unearned long-term revenue is recognized over a period of five years or less with immaterial amounts recognized through 2025.