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Income Taxes - Narrative (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2017
Income Tax Contingency [Line Items] |  |  |  |
Intercompany dividends | $ 150,000,000 | $ 130,000,000 | $ 250,000,000 |
Expected future taxable income to realize deferred tax assets | 104,483,000 |  |  |
Deferred tax assets OCL period increase (decrease) | 297,000 |  |  |
Deferred tax assets valuation allowance | 1,519,000 | 195,000 |  |
Tax credit carryforwards | 410,000 | 36,000 |  |
Adjusted transition tax |  |  | 57,895,000 |
US tax on deemed repatriated foreign earnings |  | 6,348,000 |  |
Undistributed earnings of foreign subsidiaries | 363,140,000 |  |  |
Non US subsidiary cash and cash equivalents | 177,229,000 |  |  |
Undistributed earnings from foreign subsidiaries not subject to transition tax | 8,620,000 |  |  |
Withholding tax | 0 |  |  |
Income tax penalties and interest accrued | 3,631,000 | 2,456,000 |  |
Income tax penalties and interest expense | 1,176,000 | (110,000) | 369,000 |
Decrease in unrecognized tax benefit expected to settle in next twelve months | 788,000 |  |  |
Unrecognized tax benefits | 17,638,000 | $ 10,942,000 | $ 9,594,000 | $ 11,727,000
Income Tax Expense (Benefit) |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Decrease in unrecognized tax benefit expected to settle in next twelve months | 563,000 |  |  |
Interest Expense |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Decrease in unrecognized tax benefit expected to settle in next twelve months | $ 937,000 |  |  |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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