Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2014	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Income Tax [Line Items]
Continuing operations		$ 54,430	$ 38,006	$ 75,535
Fines Imposed By European Commission	$ 53,000
Tax benefit arising from payment of a portion of the European Commission Fine by a subsidiary		(0.00%)	5.00%	(0.00%)
Unrecognized tax benefits that would impact effective tax rate		$ 1,800
Liability where a significant change in unrecognized tax benefits is reasonably possible		$ 100
U.S. Federal [Member]
Income Tax [Line Items]
Open Tax Year		2013
Minimum [Member] | State And Foreign Jurisdictions [Member]
Income Tax [Line Items]
Open tax years		3 years
Maximum [Member] | State And Foreign Jurisdictions [Member]
Income Tax [Line Items]
Open tax years		6 years
Deltafina [Member]
Income Tax [Line Items]
Continuing operations	8,000
Fines Imposed By European Commission	$ 30,000