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Fair Value Disclosure (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	$ 18,194		$ 17,696
Gain (loss) on equity securities	455	$ (870)
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) on equity securities	900	(600)
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Bellaire
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) on equity securities	(400)	$ (300)
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Reported Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities cost				$ 2,000
Equity securities	5,100		4,200
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Reported Value Measurement \| Bellaire
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities cost				$ 5,000
Equity securities	$ 13,100		$ 13,500