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Property and Equipment
 12 Months Ended
Dec. 31, 2019
Property and Equipment  
Property and Equipment

4.           Property and Equipment

Property and equipment (in thousands), together with the related estimated useful lives at December 31, 2019 and 2018, were as follows:

 

 

 

 

 

 

 

 

 

 

 

 

December 31,

 

 

 

 

    

2019

    

2018

 

Useful Lives

Land, building and other

 

$
16,611

 

$
15,164

 

 

3 to 40 years

Recording equipment

 

 
163,564

 

 
171,514

 

 

5 to 10 years

Vibrator energy sources

 

 
78,626

 

 
79,168

 

 

5 to 15 years

Vehicles

 

 
25,845

 

 
28,101

 

 

1.5 to 10 years

 

 

 
284,647

 

 
293,948

 

 

 

Less accumulated depreciation

 

 
(231,098)

 

 
(222,407)

 

 

 

Property and equipment, net

 

$
53,549

 

$
71,541