Property and equipment, net, consisted of the following at December 31, 2015 and 2016 (in thousands):

 

 

 

 

 

 

 

 

 

    

2015

    

2016

 

Building improvements

 

$

13,655

 

$

16,817

 

Equipment

 

 

207,667

 

 

204,743

 

Capital leases - property

 

 

26,945

 

 

26,945

 

Capital leases - equipment

 

 

12,335

 

 

14,729

 

Capitalized internal-use software

 

 

396,794

 

 

446,619

 

 

 

 

657,396

 

 

709,853

 

Accumulated depreciation

 

 

(482,651)

 

 

(537,329)

 

Property and equipment, net

 

$

174,745

 

$

172,524