Property, plant and equipment, net consisted of the following as of December 31 (in thousands):

 

 

 

 

 

 

 

 

 

 

 

    

2015

    

2014

 

Land

 

$

6,163

 

$

4,553

 

Building and leasehold improvements

 

 

36,363

 

 

25,516

 

Vehicles

 

 

258,087

 

 

175,082

 

Computer hardware and software

 

 

129,398

 

 

97,978

 

Communication and medical equipment and other

 

 

187,421

 

 

114,849

 

 

 

 

617,432

 

 

417,978

 

Less: accumulated depreciation and amortization

 

 

(281,563)

 

 

(206,702)

 

Property, plant and equipment, net

 

$

335,869

 

$

211,276