Income Taxes - Income Taxes in Consolidated Income Statement (Details) - USD ($) $ in Thousands  | 
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2018  | 
Mar. 31, 2017  | 
Mar. 31, 2016  | 
|
| Current Provision [Abstract] | |||
| Federal provision | $ 3,937 | $ 1,588 | $ 4,185 | 
| Foreign provision | 12,768 | 6,341 | 8,503 | 
| State provision | 301 | 155 | 311 | 
| Deferred Provision [Abstract] | |||
| Federal deferred benefit | (8,506) | (1,907) | (1,964) | 
| Foreign deferred benefit | (3,178) | (2,025) | (2,263) | 
| State deferred benefit | (152) | (54) | (56) | 
| Total provision for income taxes | $ 5,170 | $ 4,098 | $ 8,716 | 
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- Definition Current Provision [Abstract] No definition available. 
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- Definition Deferred Provision [Abstract] No definition available. 
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- Definition Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of current foreign income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of deferred foreign income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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