Investments - Fair Value, Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Marketable Securities [Line Items]
Estimated Fair Value	$ 278,344	$ 137,620
Obligations of U.S. Government and its agencies
Marketable Securities [Line Items]
Estimated Fair Value	277,358	129,371
Corporate debt securities
Marketable Securities [Line Items]
Estimated Fair Value		6,092
Certificates of deposit
Marketable Securities [Line Items]
Estimated Fair Value	986	2,157
Fair Value, Inputs, Level 1
Marketable Securities [Line Items]
Estimated Fair Value	0	0
Fair Value, Inputs, Level 1 | Obligations of U.S. Government and its agencies
Marketable Securities [Line Items]
Estimated Fair Value	0	0
Fair Value, Inputs, Level 1 | Corporate debt securities
Marketable Securities [Line Items]
Estimated Fair Value		0
Fair Value, Inputs, Level 1 | Certificates of deposit
Marketable Securities [Line Items]
Estimated Fair Value	0	0
Fair Value, Inputs, Level 2
Marketable Securities [Line Items]
Estimated Fair Value	278,344	137,620
Fair Value, Inputs, Level 2 | Obligations of U.S. Government and its agencies
Marketable Securities [Line Items]
Estimated Fair Value	277,358	129,371
Fair Value, Inputs, Level 2 | Corporate debt securities
Marketable Securities [Line Items]
Estimated Fair Value		6,092
Fair Value, Inputs, Level 2 | Certificates of deposit
Marketable Securities [Line Items]
Estimated Fair Value	986	2,157
Fair Value, Inputs, Level 3
Marketable Securities [Line Items]
Estimated Fair Value	0	0
Fair Value, Inputs, Level 3 | Obligations of U.S. Government and its agencies
Marketable Securities [Line Items]
Estimated Fair Value	0	0
Fair Value, Inputs, Level 3 | Corporate debt securities
Marketable Securities [Line Items]
Estimated Fair Value		0
Fair Value, Inputs, Level 3 | Certificates of deposit
Marketable Securities [Line Items]
Estimated Fair Value	$ 0	$ 0