XML 67 R53.htm IDEA: XBRL DOCUMENT v3.10.0.1
Inventories - Schedule of Inventories (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Inventory Disclosure [Abstract]    
Finished products $ 65,965 $ 66,064
Work in process 6,169 10,141
Raw materials and supplies 124,554 117,388
Inventories at current cost 196,688 193,593
Less: LIFO valuation (40,086) (39,854)
Total inventories $ 156,602 $ 153,739