Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands |
Jun. 30, 2018 |
Mar. 31, 2018 |
|---|---|---|
| Accumulated other comprehensive income | ||
| Unrealized gain on foreign currency exchange rate hedges | $ 5,566 | $ 243 |
| Cumulative foreign currency translation loss | (20,689) | (13,226) |
| Accumulated other comprehensive loss | $ (15,123) | $ (12,983) |