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Deferred Revenue and Performance Obligations (Tables)
3 Months Ended
Mar. 31, 2021
Revenue from Contract with Customer [Abstract]  
Changes in deferred revenue
Total deferred revenue, including long-term, by segment is as follows:
March 31, 2021December 31, 2020
Enterprise Software$395,374 $422,742 
Appraisal and Tax23,551 36,945 
Corporate1,693 1,691 
Totals$420,618 $461,378 
Changes in total deferred revenue, including long-term, were as follows:
Three months ended March 31, 2021
Balance as of December 31, 2020$461,378 
Deferral of revenue231,991 
Recognition of deferred revenue(272,751)
Balance as of March 31, 2021$420,618