|
|
|
December 31 |
|
||||
|
|
|
2016 |
|
2015 |
|
||
|
Land and improvements |
|
$ |
37,479 |
|
$ |
32,522 |
|
|
Mineral rights |
|
|
11,240 |
|
|
— |
|
|
Buildings |
|
|
90,385 |
|
|
67,841 |
|
|
Machinery, equipment and customer capital |
|
|
494,722 |
|
|
458,975 |
|
|
Computer hardware and software |
|
|
43,631 |
|
|
41,850 |
|
|
Furniture and vehicles |
|
|
10,893 |
|
|
10,534 |
|
|
Construction-in-progress |
|
|
30,525 |
|
|
32,141 |
|
|
|
|
|
718,875 |
|
|
643,863 |
|
|
Less accumulated depreciation |
|
|
(352,433) |
|
|
(332,844) |
|
|
Property, plant and equipment, net |
|
$ |
366,442 |
|
$ |
311,019 |
|