Accounts Receivable Discount Programs (Details) - USD ($)	6 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Accounts Receivable Discount Programs [Abstract]
Receivables discounted	$ 167,905,000	$ 136,326,000
Weighted average days	342 days	336 days
Annualized weighted average discount rate	2.20%	2.00%
Amount of discount as interest expense	$ 3,452,000	$ 2,542,000