Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2023

Fair Value Measurements

Summary of financial assets and liabilities measured on recurring basis

	September 30, 2023								December 31, 2022
	Level I		Level II		Level III		Total		Level I		Level II		Level III		Total
	(in thousands)
Financial Assets:
Cash, cash equivalents and restricted cash (1)	$	668,710	$	—	$	—	$	668,710	$	466,091	$	—	$	—	$	466,091
U.S. Treasury securities		224,443		—		—		224,443		346,057		—		—		346,057
Corporate bonds and notes		—		3,976		—		3,976		—		23,529		—		23,529
Municipal securities		—		39,428		—		39,428		—		62,715		—		62,715
Total financial assets	$	893,153	$	43,404	$	—	$	936,557	$	812,148	$	86,244	$	—	$	898,392