Marketable Securities - Marketable Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Amortized Cost
Total available-for-sale securities	$ 370,323	$ 284,172
Unrealized Gains (Losses)
Unrealized Gains	980	265
Unrealized Losses	(8)	(70)
Fair Value
Marketable securities	371,295	284,367
One Year or Less
Amortized Cost
Total securities with a maturity of one year or less	309,228	260,966
Unrealized Gains (Losses)
Unrealized Gains	700	127
Unrealized Losses	(8)	(70)
Fair Value
Total securities with a maturity of one year or less	309,920	261,023
One to Two Years
Amortized Cost
Total securities with a maturity of more than one year	61,095	23,206
Unrealized Gains (Losses)
Unrealized Gains	280	138
Unrealized Losses	0	0
Fair Value
Total securities with a maturity of more than one year	61,375	23,344
U.S. government agency securities and treasuries | One Year or Less
Amortized Cost
Total securities with a maturity of one year or less	248,221	235,500
Unrealized Gains (Losses)
Unrealized Gains	490	127
Unrealized Losses	0	(41)
Fair Value
Total securities with a maturity of one year or less	248,711	235,586
U.S. government agency securities and treasuries | One to Two Years
Amortized Cost
Total securities with a maturity of more than one year	50,497	15,537
Unrealized Gains (Losses)
Unrealized Gains	157	45
Unrealized Losses	0	0
Fair Value
Total securities with a maturity of more than one year	50,654	15,582
Corporate debt securities | One Year or Less
Amortized Cost
Total securities with a maturity of one year or less	61,007	25,466
Unrealized Gains (Losses)
Unrealized Gains	210	0
Unrealized Losses	(8)	(29)
Fair Value
Total securities with a maturity of one year or less	61,209	25,437
Corporate debt securities | One to Two Years
Amortized Cost
Total securities with a maturity of more than one year	10,598	7,669
Unrealized Gains (Losses)
Unrealized Gains	123	93
Unrealized Losses	0	0
Fair Value
Total securities with a maturity of more than one year	$ 10,721	$ 7,762