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Property and Equipment
 12 Months Ended
Dec. 31, 2016
Property and Equipment [Abstract]  
Property and Equipment
4. Property and Equipment

Property and equipment are comprised of the following (U.S. dollars in thousands):

  
December 31,
 
  
2015
  
2016
 
       
Land 
 
$
33,610
  
$
33,158
 
Buildings 
  
272,208
   
266,436
 
Construction in progress(1) 
  
7,827
   
31,124
 
Furniture and fixtures 
  
81,274
   
82,194
 
Computers and equipment 
  
141,079
   
143,014
 
Leasehold improvements 
  
116,120
   
109,863
 
Scanners 
  
11,805
   
10,578
 
Vehicles 
  
2,207
   
2,090
 
   
666,130
   
678,457
 
Less: accumulated depreciation 
  
(211,593
)
  
(233,725
)
  
$
454,537
  
$
444,732
 
(1)
Construction in progress includes $0.7 million and $25.8 million as of December 31, 2015 and 2016, respectively, of eligible capitalized internal-use software development costs which will be reclassified to computers and equipment when placed into service.

Depreciation of property and equipment totaled $46.5 million, $61.6 million and $60.8 million for the years ended December 31, 2014, 2015 and 2016, respectively.