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Goodwill and Other Intangible Assets - Summary of Activity In Goodwill Balance (Details)
$ in Thousands
6 Months Ended
Sep. 30, 2018
USD ($)
Goodwill  
Balance at the beginning of the period $ 275,451
Acquisition (Note 2) 71,116
Currency translation (19)
Balance at the end of the period $ 346,548