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Property and Equipment
 12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment [Abstract]  
Property and Equipment
Property and Equipment
Property and equipment consist of the following.
 
December 31,
 
2017
 
2016
Leasehold improvements
$
77,921

 
$
69,278

Construction in progress
806

 
2,349

Furniture and equipment
33,827

 
35,780

Computer equipment and software
100,186

 
94,637

 
212,740

 
202,044

Accumulated depreciation
(137,665
)
 
(140,188
)
Property and equipment, net
$
75,075

 
$
61,856

 
Depreciation expense for property and equipment totaled $24.4 million, $26.7 million and $24.9 million during the years ended December 31, 2017, 2016 and 2015, respectively.