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PROPERTY AND EQUIPMENT (Tables)
12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment [Abstract]  
Schedule of Property and Equipment
As of December 31, 2018 and 2017, property and equipment consisted of the following:
 
Range of Depreciable Lives
 
 
 
(Years)
 
2018
 
2017
 
 
 
 
 
 
 
 
 
(in thousands)
Land
 
 
$
3,518

 
$
2,742

Buildings
25-30
 
27,179

 
29,309

Equipment
2-20
 
337,589

 
280,774

Software
2-10
 
539,879

 
411,975

Leasehold improvements
3-15
 
73,298

 
63,154

Furniture and fixtures
3-7
 
45,346

 
24,054

 
 
 
1,026,809

 
812,008

Less accumulated depreciation and amortization
 
 
(503,827
)
 
(314,336
)
Work-in-progress
 
 
130,560

 
90,676

 
 
 
$
653,542

 
$
588,348