Inventories (Tables)

6 Months Ended

Jun. 30, 2018

Inventory Disclosure [Abstract]

Schedule of Inventory

Inventories at June 30, 2018 and December 31, 2017 are summarized in the following table:

	June 30, 2018		December 31, 2017
Finished goods	$	48,580	$	55,846
Contract assets	29,247		25,320
Work-in-process	9,852		4,059
Raw materials	19,564		17,505
Total inventories at current costs	107,243		102,730
Less: LIFO reserve	(5,900)		(5,187)
	$	101,343	$	97,543