Income Taxes (Details) - USD ($) $ in Thousands  | 
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2018  | 
Sep. 30, 2018  | 
Sep. 30, 2017  | 
Mar. 31, 2018  | 
|
| Income Tax Disclosure [Abstract] | ||||
| Net impact on U.S. deferred tax assets and liabilities (provisional) | $ 6,030 | |||
| Effective tax rate before discrete events | 30.50% | 24.80% | ||
| Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Liability | $ 5 | |||
| X | ||||||||||
- Definition Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Liability No definition available. 
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| X | ||||||||||
- Definition Tax Cuts and Jobs Act of 2017, Net Impact on Deferred Tax Assets and Liabilities No definition available. 
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| X | ||||||||||
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
- References No definition available. 
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