Fair Value (Tables)

3 Months Ended

Mar. 31, 2023

Fair Value [Abstract]

Fair value, assets measured on recurring basis

The following table presents, for each of the fair value hierarchy levels, assets that are measured at fair value on a recurring basis at March 31, 2023 and December 31, 2022 (in thousands):

	As of March 31, 2023
	Quoted Prices in
	Active Markets for
	Identical Assets		Other Observable		Unobservable
	(Level 1)		Inputs (Level 2)		Inputs (Level 3)		Total
U.S. Treasury securities and obligations of U.S. Government	$	—	$	54,627	$	—	$	54,627
Corporate bonds		—		197,231		—		197,231
Corporate bank loans		—		54,015		—		54,015
Municipal bonds		—		32,844		—		32,844
Mortgage-backed		—		1,337		—		1,337
Total debt securities		—		340,054		—		340,054
Total equity securities		22,392		—		—		22,392
Total investments	$	22,392	$	340,054	$	—	$	362,446

	As of December 31, 2022
	Quoted Prices in
	Active Markets for
	Identical Assets		Other Observable		Unobservable
	(Level 1)		Inputs (Level 2)		Inputs (Level 3)		Total
U.S. Treasury securities and obligations of U.S. Government	$	—	$	79,978	$	—	$	79,978
Corporate bonds		—		235,044		—		235,044
Corporate bank loans		—		75,183		—		75,183
Municipal bonds		—		35,018		—		35,018
Mortgage-backed		—		1,374		—		1,374
Total debt securities		—		426,597		—		426,597
Total equity securities		28,199		—		—		28,199
Total investments	$	28,199	$	426,597	$	—	$	454,796