Accounts Receivable Discount Programs (Details) - USD ($)	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Accounts Receivable Discount Programs [Abstract]
Receivables discounted	$ 79,247,000	$ 68,608,000
Weighted average days	342 days	337 days
Annualized weighted average discount rate (in hundredths)	2.10%	2.00%
Amount of discount as interest expense	$ 1,579,000	$ 1,292,000