December 31,
2016
2015
Raw materials
$
68,900
$
75,666
Work in progress
47,759
56,025
Finished goods
19,069
35,508
Spares and other
23,129
21,528
158,857
188,727
Reduction to LIFO cost basis
(29,879
)
(38,496
)
Total inventories
$
128,978
$
150,231