Investments (Narrative) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2026 USD ($) security item	Dec. 31, 2025 USD ($) security	Jun. 30, 2025 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Fair value	$ 452,345	$ 454,586
Number of investments in a single issuer exceeds 10% of shareholders' equity | item	0
Percent of shareholders equity benchmark for investments in a single issuer	10.00%
Fair Value	$ 409,404	398,977
Unrealized Losses	$ 29,410	$ 27,509	$ 1,900
Number of debt securities | security	453	466
Public Funds And Trust Deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value	$ 368,300	$ 353,500