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Capitalized Data and Database Development Costs, Net
 12 Months Ended
Dec. 31, 2014
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, 2014 and 2013 consists of the following:

(in thousands)
2014
 
2013
Property data
$
477,221

 
$
446,991

Flood data
55,416

 
55,416

Eviction data
18,068

 
16,559

 
550,705

 
518,966

Less accumulated amortization
(217,440
)
 
(188,778
)
Capitalized data and database costs, net
$
333,265

 
$
330,188



Amortization expense for capitalized data and database development costs was approximately $32.6 million, $30.1 million and $27.3 million for the years ended December 31, 2014, 2013 and 2012, respectively.