Convertible Senior Notes - Additional Information (Detail)			1 Months Ended		6 Months Ended
	Jun. 01, 2022 USD ($)	Jan. 01, 2022 USD ($)	Jun. 30, 2020 USD ($) $ / shares shares	May 31, 2017 USD ($) $ / shares	Jun. 30, 2022 USD ($) $ / shares shares	Jun. 30, 2021 USD ($)
Debt Instrument [Line Items]
Increase in retained earnings		$ 31,400,000
Increase in convertible senior notes		69,800,000
Increase in short term convertible senior notes		500,000
Increase in long term convertible senior notes		69,300,000
Decrease in additional paid in capital		$ 101,200,000
Aggregate principal amount paid					$ 1,619,000
Cash received upon settlement					$ 60,483,000	$ 725,000
0.375% Convertible Senior Notes Due 2025 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage			0.375%
Debt instrument, maturity date					Jun. 01, 2025
Debt instrument, payment terms					The interest rate is fixed at 0.375% per annum and is payable semi-annually in arrears on June 1 and December 1 of each year.
Proceeds from issuance of notes			$ 450,100,000
Principal amount of each convertible note			$ 1,000
Debt instrument, conversion ratio			3.5396
Principal amount settlement, Description					The Company expects to settle the principal amount of the 2025 Notes in cash.
Debt instrument, conversion price per share | $ / shares			$ 282.52
Additional paid in capital for conversion feature			$ 96,600,000
0.375% Convertible Senior Notes Due 2025 [Member] | Capped Call Options [Member]
Debt Instrument [Line Items]
Cost of purchased capped call options			$ 50,600,000
Derivative, price risk option strike price | $ / shares			$ 282.52
Derivative, cap price | $ / shares			$ 426.44
0.375% Convertible Senior Notes Due 2025 [Member] | Private Offering [Member]
Debt Instrument [Line Items]
Principal amount of long term debt			$ 400,000,000
0.375% Convertible Senior Notes Due 2025 [Member] | Over-Allotment Options [Member]
Debt Instrument [Line Items]
Principal amount of long term debt			$ 60,000,000
0.375% Convertible Senior Notes Due 2025 [Member] | Maximum [Member] | Capped Call Options [Member]
Debt Instrument [Line Items]
Common stock shares covered under capped call transactions | shares			1,600,000
0.25% Convertible Senior Notes Due 2022 [Member]
Debt Instrument [Line Items]
Principal amount of long term debt				$ 1,000
Debt instrument, interest rate, stated percentage				0.25%
Debt instrument, maturity date					Jun. 01, 2022
Debt instrument, payment terms					The interest rate is fixed at 0.25% per annum and is payable semi-annually in arrears on June 1 and December 1 of each year.
Proceeds from issuance of notes				$ 389,200,000
Debt instrument, conversion ratio				10.5519
Debt instrument, conversion price per share | $ / shares				$ 94.77
Aggregate principal amount paid	$ 19,400,000
Conversion premium in excess of principal amount	60,400,000
Additional paid in capital for conversion feature					$ 18,900,000
Number of common shares to be repurchased under convertible note hedge transactions with certain counterparties | shares					4,200,000
Hedging option strike price per common stock | $ / shares					$ 94.77
Cash received upon settlement	$ 60,500,000
Warrants expected to settle, description					The Warrants are expected to settle three business days from each trading day commencing on September 1, 2022 and ending on the 79th trading day thereafter.
Settlement period of warrants excess price over strike price					3 days
Warrants expected to settle, commencement date					Sep. 01, 2022
0.25% Convertible Senior Notes Due 2022 [Member] | Common Stock [Member]
Debt Instrument [Line Items]
Warrants holders option to purchase number of shares of company’s common stock | shares					4,200,000
Warrants exercise price per share | $ / shares					$ 115.8
0.25% Convertible Senior Notes Due 2022 [Member] | Private Offering [Member]
Debt Instrument [Line Items]
Principal amount of long term debt				$ 350,000,000.0
0.25% Convertible Senior Notes Due 2022 [Member] | Over-Allotment Options [Member]
Debt Instrument [Line Items]
Principal amount of long term debt				$ 50,000
2022 Notes Convertible Note Hedges [Member] | Warrants [Member]
Debt Instrument [Line Items]
Debt instrument convertible to common stock | shares					1,300,000