Inventories, Net Level 4 (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Mar. 31, 2013
Inventory, Raw Materials	$ 59,401	$ 54,456
Inventory, Work in Process	28,603	24,300
Inventory, Finished Goods	102,870	96,616
Inventory, LIFO Reserve	(16,039)	(18,944)
Inventory Valuation Reserves	(14,936)	(11,985)
Inventory, Net	$ 159,899	$ 144,443