Fair Value Measurements - Schedule of Marketable Debt Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Amortized Cost	$ 81,846	$ 78,573
Gross Unrealized Gains	372	123
Gross Unrealized Losses	(2,671)	(3,056)
Estimated Fair Value	79,547	75,640
Credit Impairment Losses	0	0
Unrestricted
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Amortized Cost	53,158	53,531
Gross Unrealized Gains	9	0
Gross Unrealized Losses	(2,671)	(2,996)
Estimated Fair Value	50,496	50,535
Credit Impairment Losses	0	0
Unrestricted | Municipal bonds — taxable
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Amortized Cost	10,249	10,276
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(528)	(676)
Estimated Fair Value	9,721	9,600
Credit Impairment Losses	0	0
Unrestricted | Municipal bonds — non-taxable
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Amortized Cost	42,909	43,255
Gross Unrealized Gains	9	0
Gross Unrealized Losses	(2,143)	(2,320)
Estimated Fair Value	40,775	40,935
Credit Impairment Losses	0	0
Restricted
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Amortized Cost	28,688	25,042
Gross Unrealized Gains	363	123
Gross Unrealized Losses	0	(60)
Estimated Fair Value	29,051	25,105
Credit Impairment Losses	0	0
Restricted | Municipal bonds — taxable
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Amortized Cost	9,168	9,131
Gross Unrealized Gains	142	40
Gross Unrealized Losses	0	(41)
Estimated Fair Value	9,310	9,130
Credit Impairment Losses	0	0
Restricted | U.S. treasury bonds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Amortized Cost	9,296	7,276
Gross Unrealized Gains	106	38
Gross Unrealized Losses	0	(5)
Estimated Fair Value	9,402	7,309
Credit Impairment Losses	0	0
Restricted | U.S. government agency bonds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Amortized Cost	1,223	1,208
Gross Unrealized Gains	11	10
Gross Unrealized Losses	0	0
Estimated Fair Value	1,234	1,218
Credit Impairment Losses	0	0
Restricted | International fixed income bonds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Amortized Cost	715	647
Gross Unrealized Gains	5	5
Gross Unrealized Losses	0	0
Estimated Fair Value	720	652
Credit Impairment Losses	0	0
Restricted | Corporate bonds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Amortized Cost	8,286	6,780
Gross Unrealized Gains	99	30
Gross Unrealized Losses	0	(14)
Estimated Fair Value	8,385	6,796
Credit Impairment Losses	$ 0	$ 0