Fair Value Measurements (Details) - USD ($) $ in Thousands	Jun. 30, 2025		Dec. 31, 2024		Jun. 30, 2024
Fair Value Measurements [Abstract]
Available-for-sale securities	$ 2,047,955		$ 2,056,008
1.75% Notes [Member]
Fair Value Measurements [Abstract]
Interest rate on convertible senior notes	1.75%		1.75%		1.75%
0% Notes [Member]
Fair Value Measurements [Abstract]
Interest rate on convertible senior notes	0.00%		0.00%		0.00%
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | 1.75% Notes [Member]
Fair Value Measurements [Abstract]
Convertible notes	$ 604,200		$ 569,300
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | 0% Notes [Member]
Fair Value Measurements [Abstract]
Convertible notes	640,700		612,800
Recurring Basis [Member] | Corporate Debt Securities [Member]
Fair Value Measurements [Abstract]
Available-for-sale securities	1,066,386	[1]	1,032,066	[2]
Recurring Basis [Member] | Corporate Debt Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value Measurements [Abstract]
Available-for-sale securities	1,066,386	[1]	1,032,066	[2]
Recurring Basis [Member] | US Treasury Securities [Member]
Fair Value Measurements [Abstract]
Available-for-sale securities	777,981	[3]	806,724	[2]
Recurring Basis [Member] | US Treasury Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value Measurements [Abstract]
Available-for-sale securities	0	[3]	$ 0	[2]
Cash and Cash Equivalents [Member] | Recurring Basis [Member] | Corporate Debt Securities [Member]
Fair Value Measurements [Abstract]
Available-for-sale securities	29,900
Cash and Cash Equivalents [Member] | Recurring Basis [Member] | US Treasury Securities [Member]
Fair Value Measurements [Abstract]
Available-for-sale securities	$ 24,400

[1] $29.9 million was included in cash and cash equivalents, with the difference included in short-term investments.

[2] Included in short-term investments.

[3] $24.4 million was included in cash and cash equivalents, with the difference included in short-term investments.