Fair Value Measurements - Reconciliation of Activity Related Other Investments (Detail) $ in Thousands	9 Months Ended
Dec. 31, 2019 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Initial investment	$ 278,875
Proceeds from investment in securities of the Joint Venture	(7,332)
Change in fair value	73,400
Balance at end of period	$ 344,943

Fair value portion of investments accounted under the equity method.

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Amount of investments classified as other.

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Amount of cash outflow to acquire investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of cash inflow from sale, maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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