Convertible Senior Notes - Additional Information (Detail)			3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 14, 2023 USD ($)	Jul. 19, 2019 USD ($) $ / shares	Jun. 30, 2024 USD ($) Days $ / shares	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) $ / shares	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Dec. 06, 2023 $ / shares	Jul. 31, 2019 USD ($)
Debt Instrument [Line Items]
Amortization of debt issuance costs			$ 520,000	$ 457,000	$ 1,003,000	$ 914,000
1.00% Convertible Senior Notes due 2028
Debt Instrument [Line Items]
Notes issued	$ 290,100,000
Notes, interest rate			1.00%		1.00%
Notes for cash	290,100,000
Unamortized debt issuance costs			$ 7,542,000		$ 7,542,000		$ 8,400,000
Aggregate debt discount			$ 74,733,000		$ 74,733,000		81,457,000
Notes conversion ratio per $1,000 principal amount					4,924.7000
Notes initial conversion price | $ / shares			$ 203.06		$ 203.06
Premium over sale price					30.00%
Closing price of common stock | $ / shares								$ 156.2
Interest repayment terms					Interest is payable semi-annually in arrears on each of June 15 and December 15, which commenced on June 15, 2024
Notes, due date					Dec. 15, 2028
Notes, carrying value			$ 517,700,000		$ 517,700,000		510,100,000
Fair value of the note			497,400,000		497,400,000		596,000,000
1.00% Convertible Senior Notes due 2028 | Common Stock
Debt Instrument [Line Items]
Notes issued			1,000		1,000
1.00% Convertible Senior Notes due 2028 | Exchange And Subscription Agreements
Debt Instrument [Line Items]
Notes issued	600,000,000
1.00% Convertible Senior Notes due 2028 | Subscription Transactions
Debt Instrument [Line Items]
Notes issued	290,100,000
Proceeds from issuance of convertible senior notes, net of costs	276,100,000
Notes for cash	290,100,000
Payment of debt issuance costs	13,900,000
Proceeds from issuance of common stock, net of issuance costs	14,400,000
1.00% Convertible Senior Notes due 2028 | Exchanged 2019 Notes
Debt Instrument [Line Items]
Loss on extinguishment of debt	29,600,000						12,700,000
Debt instrument exchanged amount	217,700,000
Modification of debt	188,100,000
Unamortized debt issuance costs							100,000
1.00% Convertible Senior Notes due 2028 | Modified 2019 Notes
Debt Instrument [Line Items]
Notes issued			72,200,000		72,200,000		78,700,000
Unamortized debt issuance costs							7,700,000
Aggregate debt discount			74,700,000		74,700,000		81,500,000
Payment of debt issuance costs	6,200,000
Amortization of debt issuance costs	7,700,000
1.00% Convertible Senior Notes due 2028 | Modified 2019 Notes | Additional Paid-In Capital
Debt Instrument [Line Items]
Conversion of Convertible Securities Stock Issued | value	$ 2,800,000
1.00% Convertible Senior Notes due 2028 | Modified 2019 Notes | Fair Value Of Embedded Conversion Option
Debt Instrument [Line Items]
Conversion of Convertible Securities Stock Issued | value					$ 2,500,000		2,800,000
1.00% Convertible Senior Notes due 2028 | 2023 Notes
Debt Instrument [Line Items]
Notes redemption price					100.00%
Notes, carrying value			517,700,000		$ 517,700,000		510,100,000
0.375% Convertible Senior Notes due 2024
Debt Instrument [Line Items]
Notes issued		$ 287,500,000	69,500,000		69,500,000		69,700,000		$ 287,500,000
Notes, interest rate		0.375%
Proceeds from issuance of convertible senior notes, net of costs		$ 278,500,000
Unamortized debt issuance costs			23,000		23,000		248,000
Notes conversion ratio per $1,000 principal amount		8.6749
Notes initial conversion price | $ / shares		$ 115.28
Subsequent to conversion			200,000		$ 200,000
Interest repayment terms					Interest is payable semi-annually in arrears on January 15 and July 15 of each year, beginning on January 15, 2020.
Notes, due date					Jul. 15, 2024
Notes, carrying value			69,500,000		$ 69,500,000		69,500,000
Fair value of the note			82,600,000		82,600,000		109,800,000
Additional Notes issued		$ 37,500,000
Debt instrument amount convertible into equity			$ 300,000		$ 300,000
Debt Instrument, Convertible, Threshold Trading Days | Days			20
Debt Instrument, Convertible, Threshold Consecutive Trading Days | Days			30
Notes threshold percentage of stock price trigger			130.00%
0.375% Convertible Senior Notes due 2024 | Common Stock
Debt Instrument [Line Items]
Notes issued		$ 1,000
0.375% Convertible Senior Notes due 2024 | Exchange Transaction
Debt Instrument [Line Items]
Notes issued							$ 69,700,000