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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
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 |  |  |

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319 + Details
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