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

 

 

 

 

 

 

 

 

 

 

 

 

Estimated

 

 

 

 

 

 

 

 

    

Useful Lives

    

December 31,

 

 

    

in Years

    

2016

    

2015

 

Land

 

 —

 

$
2,745

 

$
2,745

 

Transportation equipment

 

1 - 7

 

 
74,137

 

 
64,951

 

Machinery and equipment

 

1 - 20

 

 
27,843

 

 
25,118

 

Computer and telephone equipment

 

1 - 10

 

 
20,791

 

 
21,141

 

Buildings and leasehold improvements

 

1 - 40

 

 
35,166

 

 
30,319

 

Furniture and fixtures

 

1 - 17

 

 
4,224

 

 
4,181

 

Construction in progress

 

 —

 

 
425

 

 

 —

 

 

 

 

 

 
165,331

 

 
148,455

 

Less—Accumulated depreciation

 

 

 

 
(97,136)

 

 
(87,642)

 

Property and equipment, net

 

 

 

$
68,195

 

$
60,813