Fair Value of Financial Instruments - Rollforward of Level 3 Assets Measured on Recurring Basis (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024		Sep. 30, 2023
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Realized gains (losses) and accretion (amortization) recognized in earnings		$ 1,800	$ (500)	$ 1,900		$ (1,700)
Fair Value, Recurring Measurements [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Level 3 assets, beginning of period		10,453	$ 1,628	2,144	[1]	1,710	[1]
Net unrealized gains (losses) included in other comprehensive income (loss)		$ 146		$ 185	[1]	$ (61)	[1]
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration]		OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax	OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax	OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax		OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax
Realized gains (losses) and accretion (amortization) recognized in earnings		$ (31)	$ (8)	$ (72)	[1]	$ (89)	[1]
Purchases		1,851		10,666	[1]	2,316	[1]
Settlements	[1]					(8)
Transfers out of Level 3		(8,981)		(9,485)	[1]	(2,248)	[1]
Level 3 assets, end of period	[1]	$ 3,438	$ 1,620	$ 3,438		$ 1,620

[1] Transfers of investments that enter and exit Level 3 in different quarters within the same fiscal year are not eliminated until the full year amounts are presented.