Inventories (Tables)

9 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Schedule of Inventory, Current

Inventories consisted of the following (in thousands):

	December 31, 2017			March 31, 2017
At cost - FIFO basis:
Raw materials	$	81,312		$	74,716
Work-in-process	40,220			39,117
Finished goods	38,420			33,666
Total at cost FIFO basis	159,952			147,499
LIFO cost less than FIFO cost	(15,255		)	(16,856		)
Net inventories	$	144,697		$	130,643