Inventories (Tables)

3 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Schedule of Inventory

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

	March 31, 2018			December 31, 2017
Finished goods	$	54,983		$	55,846
Contract assets	24,862			25,320
Work-in-process	7,721			4,059
Raw materials	18,837			17,505
Total inventories at current costs	106,403			102,730
Less: LIFO reserve	(5,351		)	(5,187		)
	$	101,052		$	97,543