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Property and Equipment, Net (Tables)
12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment [Abstract]  
Summary of Property and Equipment, Net
Property and equipment, net consists of the following at December 31:
 
Useful
Lives
(years)
 
2018
 
2017
Land

 
$
9,958

 
$
9,958

Building and leasehold improvements
5-39

 
122,241

 
116,214

Computer equipment and purchased software
3-5

 
84,649

 
72,531

Furniture and fixtures
5

 
27,238

 
24,834

Transportation equipment
5

 
438

 
476

 
 
 
244,524

 
224,013

Accumulated depreciation and amortization
 
 
(89,347
)
 
(71,698
)
Property and equipment, net
 
 
$
155,177

 
$
152,315