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Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2017
Reconciliation of Unrecognized Tax Benefits |  |  |
Unrecognized tax benefits, beginning balance | $ 1,568 | $ 1,450 | $ 2,375
Increases related to current year tax positions | 129 | 397 | 252
Increases related to the Alpha acquisition | 7,840 | 0 | 0
Increases related to prior year tax positions | 11,463 | 11 | 31
Decreases related to prior tax positions due to foreign currency translation | (544) | 0 | (352)
Decreases related to prior year tax positions | (93) | (1) | (678)
Lapse of statute of limitations | (198) | (289) | (178)
Unrecognized tax benefits, ending balance | $ 20,165 | $ 1,568 | $ 1,450

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- Definition Unrecognized Tax Benefits Decrease Resulting from Prior Year Tax Position Due to Foreign Currency Translation + References No definition available. + Details
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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI http://asc.fasb.org/extlink&oid=84176650&loc=SL37586934-109318 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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