Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Tax year that remains open to examination under enacted tax laws, in CCYY format.

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The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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Fines Imposed By European Commission

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Income Tax [Line Items]

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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2014	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Income Tax [Line Items]
Continuing operations		$ 56,732	$ 54,430	$ 38,006
Fines Imposed By European Commission	$ 53,000
Tax benefit arising from payment of a portion of the European Commission Fine by a subsidiary	5.00%	(0.00%)	(0.00%)	(5.00%)
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		2014
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