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Property And Equipment
 12 Months Ended
Dec. 31, 2015
Property Plant And Equipment [Abstract]  
Property And Equipment

5. PROPERTY AND EQUIPMENT

Property and equipment at December 31, 2015 and 2014 are as follows:

 

 

 

 

2015

 

 

 

2014

 

Land

 

$

9,864

 

 

$

9,220

 

Buildings and improvements

 

 

5,896

 

 

 

5,729

 

Furniture and fixtures

 

 

10,587

 

 

 

8,863

 

Operating equipment

 

 

783,732

 

 

 

698,977

 

 

 

 

 

 

 

 

 

 

Total property and equipment

 

 

810,079

 

 

 

722,789

 

 

 

 

 

 

 

 

 

 

Accumulated depreciation

 

 

(379,869

)

 

 

(323,344

)

 

 

 

 

 

 

 

 

 

Property and equipment — net

 

$

430,210

 

 

$

399,445

 

 

Depreciation expense was $58,050, $48,569 and $45,531, for the years ended December 31, 2015, 2014 and 2013, respectively.