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Investments - Summary of Amortized Cost and Estimated Fair Value of Available-for-Sale Investments, Excluding VIE Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 73,944	$ 119,024
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0	$ 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1,439	260
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	20,320	51,012
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	171	792
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	53,624	68,012
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	3,115	4,559
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	3,286	5,351
Debt Securities, Available-for-Sale	264,055
Debt Securities, Available-for-sale, Amortized Cost	265,902	289,712
Debt Securities, Available-for-Sale, Current	264,055	284,621
Short-term Investments [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	749	0
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1	13
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	749	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0	0
Debt Securities, Available-for-Sale	102,720	127,601
Debt Securities, Available-for-sale, Amortized Cost	102,719	127,588
Fixed Income Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	73,195	119,024
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1,438	247
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	19,571	51,012
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	171	792
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	53,624	68,012
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	3,115	4,559
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	3,286	5,351
Debt Securities, Available-for-Sale	161,335	157,020
Debt Securities, Available-for-sale, Amortized Cost	163,183	162,124
Fixed Income Securities [Member] | Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	7,371	12,624
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	109	7
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	1,329	6,042
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	31	112
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	6,042	6,582
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	310	458
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	341	570
Debt Securities, Available-for-Sale	14,308	14,083
Debt Securities, Available-for-sale, Amortized Cost	14,540	14,646
Fixed Income Securities [Member] | Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	45,205	70,396
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	773	107
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	9,555	23,784
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	59	269
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	35,650	46,612
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	2,540	3,636
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	2,599	3,905
Debt Securities, Available-for-Sale	92,100	89,192
Debt Securities, Available-for-sale, Amortized Cost	93,926	92,990
Fixed Income Securities [Member] | US Government Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	16,646	30,737
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	496	98
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	4,714	15,919
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	43	344
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	11,932	14,818
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	265	465
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	308	809
Debt Securities, Available-for-Sale	44,432	40,995
Debt Securities, Available-for-sale, Amortized Cost	44,244	41,706
Fixed Income Securities [Member] | Residential Mortgage-Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	1,805	2,446
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	28	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	1,805	2,446
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	18	29
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	18	29
Debt Securities, Available-for-Sale	3,362	2,446
Debt Securities, Available-for-sale, Amortized Cost	3,352	2,475
Fixed Income Securities [Member] | Collateralized Debt Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	566	655
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	11	13
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	566	655
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	1	2
Debt Securities, Available-for-Sale	2,652	3,142
Debt Securities, Available-for-sale, Amortized Cost	2,642	3,131
Fixed Income Securities [Member] | Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	848	1,428
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	19	14
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	848	1,428
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	2	2
Debt Securities, Available-for-Sale	2,561	5,061
Debt Securities, Available-for-sale, Amortized Cost	2,544	5,049
Fixed Income Securities [Member] | Commercial Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	754	738
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	754	738
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	17	34
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	17	34
Debt Securities, Available-for-Sale	1,920
Debt Securities, Available-for-sale, Amortized Cost	1,935
Fixed Income Securities [Member] | Collateralized Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	2	8
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	17	34
Debt Securities, Available-for-Sale	1,920	2,101
Debt Securities, Available-for-sale, Amortized Cost	1,935	$ 2,127
Fixed Income Investments And Other Investments [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	$ 3,286

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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