NOTE 7.          UNEARNED REVENUE

Changes in unearned revenue were as follows:

Deferred revenue recognized in the three months ended September 30, 2018 and 2017 was $39.0 million and $36.3 million, respectively, and was $117.3 million and $101.7 million for the nine month period ended September 30, 2018 and 2017, respectively.

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 invoiced and recognized in future periods. The Company has no material contracted not recognized revenue as of September 30, 2018 or December 31, 2017.

At September 30, 2018 and December 31, 2017, the Company had long-term unearned revenue of $10.9 million and $8.6 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.