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Deferred Revenue and Performance Obligations (Tables)
6 Months Ended
Jun. 30, 2018
Revenue from Contract with Customer [Abstract]  
Changes in deferred revenue
Changes in total deferred revenue, including long-term, were as follows:

 
 
June 30, 2018
Balance, beginning of period December 31, 2017 (As Adjusted)
 
$
299,887

Deferral of revenue
 
414,396

Recognition of deferred revenue
 
(397,414
)
Balance, end of period
 
$
316,869

Total deferred revenue, including long-term, by segment is as follows:
 
 
June 30, 2018
 
December 31, 2017
 
 
 
 
As Adjusted
Enterprise Software
 
$
299,332

 
$
277,198

Appraisal and Tax
 
15,199

 
20,387

Corporate
 
2,338

 
2,302

Totals
 
$
316,869

 
$
299,887