Inventories (Tables)

6 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Schedule of Inventory, Current

Inventories consisted of the following (in thousands):

	September 30, 2018			March 31, 2018
At cost - FIFO basis:
Raw materials	$	90,695		$	84,492
Work-in-process	42,812			43,140
Finished goods	39,534			40,321
Total at cost FIFO basis	173,041			167,953
LIFO cost less than FIFO cost	(14,728		)	(15,067		)
Net inventories	$	158,313		$	152,886