Investments - Fair Value, Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Marketable Securities [Line Items]
Estimated Fair Value	$ 236,460	$ 278,344
Obligations of U.S. Government and its agencies
Marketable Securities [Line Items]
Estimated Fair Value	236,460	277,358
Certificates of deposit
Marketable Securities [Line Items]
Estimated Fair Value		986
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 | Certificates of deposit
Marketable Securities [Line Items]
Estimated Fair Value		0
Fair Value, Inputs, Level 2
Marketable Securities [Line Items]
Estimated Fair Value	236,460	278,344
Fair Value, Inputs, Level 2 | Obligations of U.S. Government and its agencies
Marketable Securities [Line Items]
Estimated Fair Value	236,460	277,358
Fair Value, Inputs, Level 2 | Certificates of deposit
Marketable Securities [Line Items]
Estimated Fair Value		986
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 | Certificates of deposit
Marketable Securities [Line Items]
Estimated Fair Value		$ 0