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PROPERTY, BUILDINGS AND EQUIPMENT
 12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment [Abstract]  
PROPERTY, BUILDINGS AND EQUIPMENT
6. PROPERTY, BUILDINGS AND EQUIPMENT
The following table sets forth the components of property, buildings and equipment:
 
As of December 31,
 
2017
 
2016
 
(In thousands)
Buildings and leasehold improvements
$
117,894

 
$
117,461

Furniture, fixtures and equipment
183,801

 
178,183

Software costs
103,842

 
93,040

 
405,537

 
388,684

Accumulated depreciation and amortization
(278,455
)
 
(259,126
)
 
127,082

 
129,558

Land
25,814

 
24,653

Construction in progress
3,549

 
3,396

 
$
156,445

 
$
157,607



Depreciation expense was $16.3 million, $17.1 million and $17.8 million, and capitalized software amortization was $9.9 million, $10.6 million and $10.3 million, in 2017, 2016 and 2015, respectively. The unamortized software cost was $22.4 million and $21.6 million as of December 31, 2017 and 2016, respectively. Furniture, fixtures and equipment include capitalized leases of $10.6 million and $12.0 million and related accumulated amortization of $9.0 million and $8.9 million as of December 31, 2017 and 2016, respectively.