Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2024

Fair Value Measurements

Schedule of assets measured at fair value on a recurring basis

Assets measured at fair value on a recurring basis are summarized below (in thousands):

	Fair Value Measurements as of March 31, 2024
	Total		Level 1		Level 2		Level 3
Marketable Securities
Bonds and bond funds	$	628,994	$	—	$	628,994	$	—
Commercial paper		12,191		—		12,191		—
		641,185		—		641,185		—
Investments in Other Companies		11,904		2,158		—		9,746
Cash and Cash Equivalents		179,979		179,979		—		—
Total Assets Measured at Fair Value	$	833,068	$	182,137	$	641,185	$	9,746

	Fair Value Measurements as of December 31, 2023
	Total		Level 1		Level 2		Level 3
Marketable Securities
Bonds and bond funds	$	677,074	$	—	$	677,074	$	—
Commercial paper		9,872		—		9,872		—
		686,946		—		686,946		—
Investments in Other Companies		15,402		2,925		—		12,477
Cash and Cash Equivalents		148,277		148,277		—		—
Total Assets Measured at Fair Value	$	850,625	$	151,202	$	686,946	$	12,477