Inventories (Narratives) (Details) - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Business Acquisition [Line Items]
Increase (Decrease) in Inventories	$ (8,173,000)	$ (2,483,000)	$ 9,080,000
LIFO liquidations	547,000	$ 384,000	$ 6,000
STAHL [Member]
Business Acquisition [Line Items]
Increase (Decrease) in Inventories	$ 16,262,000