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Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2015
Property, Plant and Equipment [Abstract]  
Components of property, plant and equipment
Property and equipment are as follows (in thousands):
 
December 31
 
2015
 
2014
Land
$
7,145

 
$
6,780

Buildings and leasehold improvements
34,351

 
33,765

Machinery, equipment and rental tools
85,611

 
80,731

Equipment in progress
12,304

 
7,299

Furniture and fixtures
2,749

 
2,528

Transportation equipment
7,462

 
6,566

Computer equipment and software
11,382

 
7,605

Property and equipment
161,004

 
145,274

Less accumulated depreciation
(69,091
)
 
(59,163
)
Property and equipment, net
$
91,913

 
$
86,111