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Capitalized Data and Database Development Costs, Net
12 Months Ended
Dec. 31, 2017
Research and Development [Abstract]  
Capitalized Data and Database Developement Costs, Net
Capitalized Data and Database Development Costs, Net

Capitalized data and database development costs, net as of December 31, 2017 and 2016 consists of the following:

(in thousands)
2017
 
2016
Property data
$
564,515

 
$
528,527

Flood data
55,416

 
55,416

Eviction data
17,017

 
17,082

 
636,948

 
601,025

Less accumulated amortization
(307,545
)
 
(273,104
)
Capitalized data and database costs, net
$
329,403

 
$
327,921



Amortization expense for capitalized data and database development costs was approximately $35.8 million, $34.6 million and $33.2 million for the years ended December 31, 2017, 2016 and 2015, respectively.