Inventories (Tables)

12 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Schedule of Inventory, Current

Inventories consisted of the following:

	March 31,
	2018			2017
At cost—FIFO basis:
Raw materials	$	84,492		$	74,716
Work-in-process	43,140			39,117
Finished goods	40,321			33,666
	167,953			147,499
LIFO cost less than FIFO cost	(15,067		)	(16,856		)
Net inventories	$	152,886		$	130,643