Fair Value Measurements (Summarize Changes in Level 3 Assets) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2025	Dec. 31, 2024
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Impairments		$ 0
Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, beginning balance	$ 28,892	9,025
Assets, earnings	471	386
Assets, other comprehensive income	309	(333)
Assets, Impairments	0
Assets, purchases	6,160	0
Assets, (sales)	(1,286)	(223)
Assets, maturities	0	0
Assets. transfers out		20,037
Securities transferred into or out of level 3, net	0
Assets, ending balance	34,546	28,892
Level 3 | Debt securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, beginning balance	19,667	0
Assets, earnings	0	0
Assets, other comprehensive income	309	(333)
Assets, Impairments	0
Assets, Impairments		0
Assets, purchases	0	0
Assets, (sales)	0	0
Assets, maturities	0	0
Assets. transfers out		20,000
Securities transferred into or out of level 3, net	0
Assets, ending balance	19,976	19,667
Level 3 | Equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, beginning balance	5,715	5,253
Assets, earnings	236	647
Assets, other comprehensive income	0	0
Assets, Impairments	0	0
Assets, purchases	6,160	0
Assets, (sales)	(1,286)	(185)
Assets, maturities	0	0
Assets. transfers out	0	0
Assets, ending balance	10,825	5,715
Level 3 | Common stock
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, beginning balance	2,041	1,558
Assets, earnings	236	611
Assets, other comprehensive income	0	0
Assets, Impairments	0	0
Assets, purchases	0	0
Assets, (sales)	(126)	(128)
Assets, maturities	0	0
Assets. transfers out	0	0
Assets, ending balance	2,151	2,041
Level 3 | Preferred stocks
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, beginning balance	3,674	3,695
Assets, earnings	0	36
Assets, other comprehensive income	0	0
Assets, Impairments	0	0
Assets, purchases	6,160	0
Assets, (sales)	(1,160)	(57)
Assets, maturities	0	0
Assets. transfers out	0	0
Assets, ending balance	8,674	3,674
Level 3 | Arbitrage trading account
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, beginning balance	3,510	3,772
Assets, earnings	235	(261)
Assets, other comprehensive income	0	0
Assets, Impairments	0
Assets, Impairments		0
Assets, purchases	0	0
Assets, (sales)	0	(38)
Assets, maturities	0	0
Assets. transfers out		37
Securities transferred into or out of level 3, net	0
Assets, ending balance	3,745	3,510
Level 3 | Corporate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, beginning balance	19,667	0
Assets, earnings	0	0
Assets, other comprehensive income	309	(333)
Assets, Impairments	0	0
Assets, purchases	0	0
Assets, (sales)	0	0
Assets, maturities	0	0
Securities transferred into or out of level 3, net	0	20,000
Assets, ending balance	$ 19,976	$ 19,667