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Property and Equipment
12 Months Ended
Dec. 31, 2018
Property Plant And Equipment [Abstract]  
Property and Equipment

8.

Property and Equipment

Property and equipment consists of the following (dollars in thousands):

 

 

 

 

 

December 31,

 

 

 

Useful Lives

 

 

2018

 

 

 

2017

 

Computer hardware and software

 

3-10 years

 

$

838,301

 

 

$

670,059

 

Leasehold improvements

 

1-15 years

 

 

472,952

 

 

 

415,947

 

Furniture and equipment

 

1-10 years

 

 

307,812

 

 

 

279,621

 

Equipment under capital leases

 

3-5 years

 

 

10,654

 

 

 

10,803

 

Total cost

 

 

 

 

1,629,719

 

 

 

1,376,430

 

Accumulated depreciation and amortization

 

 

 

 

(908,027

)

 

 

(758,691

)

Property and equipment, net

 

 

 

$

721,692

 

 

$

617,739

 

 

Depreciation and amortization expense associated with property and equipment was $192.8 million, $166.0 million and $151.2 million for the years ended December 31, 2018, 2017 and 2016, respectively.