Income Taxes - Discrete Items (Details) $ in Thousands  | 
6 Months Ended | 
|---|---|
| 
 Sep. 30, 2018  
USD ($) 
 | |
| Income Tax Disclosure [Abstract] | |
| Transition Tax (provisional) | $ 5,126 | 
| Net impact on U.S. deferred tax assets and liabilities (provisional) | (6,030) | 
| Net changes in deferred tax liability associated with anticipated repatriation taxes (provisional) | 1,704 | 
| Net discrete impacts of the enactment of the Tax Act | $ 800 | 
| X | ||||||||||
- Definition Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Income Tax Expense (Benefit) No definition available. 
  | 
| X | ||||||||||
- Definition Tax Cuts and Jobs Act of 2017, Income Tax Expense (Benefit) No definition available. 
  | 
| X | ||||||||||
- Definition Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Undistributed Accumulated Earnings of Foreign Subsidiary, Provisional Unrecognized Deferred Tax Liability No definition available. 
  | 
| X | ||||||||||
- Definition Tax Cuts and Jobs Act of 2017, Net Impact on Deferred Tax Assets and Liabilities No definition available. 
  | 
| X | ||||||||||
- References No definition available. 
  |