Other Expense, Net (Parenthetical) (Detail) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Nov. 30, 2018 USD ($)	Nov. 30, 2018 USD ($)		Nov. 30, 2018 USD ($)
Other Income And Expenses [Line Items]
Loss on extinguishment of debt		$ 3,051	[1]	$ 3,051	[1]
2.25% Convertible Senior Notes
Other Income And Expenses [Line Items]
Debt, interest rate	2.25%	2.25%		2.25%
Debt instrument redemption period	2018-11
Loss on extinguishment of debt	$ 3,100

[1] In connection with the redemption of all our outstanding 2.25% convertible senior notes in November 2018, we recognized a loss of $3.1 million, due to the fair value measurement of the instrument on the date of conversion.