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Property and Equipment, Net (Tables)
12 Months Ended
Dec. 31, 2017
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)
 
2017
 
2016
Land

 
$
9,958

 
$
9,958

Building and leasehold improvements
5-39

 
116,214

 
94,924

Computer equipment and purchased software
3-5

 
72,531

 
55,627

Furniture and fixtures
5

 
24,834

 
19,897

Transportation equipment
5

 
476

 
447

 
 
 
224,013

 
180,853

Accumulated depreciation and amortization
 
 
(71,698
)
 
(56,585
)
Property and equipment, net
 
 
$
152,315

 
$
124,268