REVENUE

12 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

REVENUE

3.          REVENUE

Adoption of ASC 606, “Revenue from Contracts with Customers”. On January 1, 2018, the Company adopted ASC 606 using the modified retrospective method applied to those contracts which were not completed as of January 1, 2018. Results for reporting periods beginning after January 1, 2018 are presented under ASC 606, while prior period amounts are not adjusted and continue to be reported in accordance with our historic accounting under ASC 605.

There was no material impact on the Company’s financial statements as a result of adopting ASC 606 for the twelve months ended December 31, 2018.

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

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 more than 10% 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,	2019		2018		2017
(in thousands)
United States	$	1,862,698	$	1,677,116	$	1,541,336
Other Countries		152,779		144,449		132,621
Total Revenues	$	2,015,477	$	1,821,565	$	1,673,957

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

Years ended December 31,	2019		2018		2017
(in thousands)
Residential revenue	$	861,636	$	773,932	$	705,787
Commercial revenue		770,342		707,386		666,523
Termite completions, bait monitoring and renewals		371,258		332,573		294,982
Other revenues		12,241		7,674		6,665
Total Revenues	$	2,015,477	$	1,821,565	$	1,673,957

Deferred revenue recognized for the year ended December 31, 2019 and 2018 was $165.0 million and $156.6 million, respectively. Changes in unearned revenue were as follows:

At December 31,	2019			2018
(in thousands)
Balance at beginning of year	$	127,075		$	117,614
Deferral of unearned revenue		174,404			166,053
Recognition of unearned revenue		(164,972	)		(156,592	)
Balance at end of year	$	136,507		$	127,075

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, 2019 or December 31, 2018.

At December 31, 2019 and December 31, 2018, the Company had long-term unearned revenue of $13.7 million and $11.1 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.