XML 41 R30.htm IDEA: XBRL DOCUMENT v3.10.0.1
INVENTORIES (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Inventory at FIFO    
Finished products $ 11,415 $ 22,558
Materials and work in process 59,689 65,034
Gross inventories 71,104 87,592
Less: LIFO reserve (45,097) (45,180)
Less: excess and obsolescence reserve (1,994) (2,698)
Net inventories $ 24,013 $ 39,714