Income Taxes (Narrative) (Details)	12 Months Ended							12 Months Ended			3 Months Ended
	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)	Mar. 31, 2013 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2014 EUR (€)	Sep. 09, 2011 EUR (€)	Nov. 15, 2005 EUR (€)	Mar. 31, 2015 U.S. Federal [Member]	Mar. 31, 2015 Minimum [Member] State And Foreign Jurisdictions [Member]	Mar. 31, 2015 Maximum [Member] State And Foreign Jurisdictions [Member]	Jun. 30, 2014 Deltafina [Member] USD ($)
Income Tax [Line Items]
Continuing operations	$ 38,006,000	$ 75,535,000	$ 66,366,000								$ 8,000,000
Fines Imposed By European Commission				53,000,000	38,900,000	30,000,000	30,000,000				30,000,000
Tax benefit arising from payment of a portion of the European Commission Fine by a subsidiary	5.00%	0.00%	0.00%
Unrecognized tax benefits that would impact effective tax rate	2,200,000
Liability where a significant change in unrecognized tax benefits is reasonably possible	$ 200,000
Open Tax Year								2012
Open tax years									3 years	6 years