Fair Value Disclosure (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	$ 18,109		$ 18,109		$ 18,663
(Loss) gain on equity securities	284	$ 442	(237)	$ 1,219
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	18,109		18,109		18,663
(Loss) gain on equity securities	(400)	(100)	(1,400)	(300)
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value Measurements, Recurring | Bellaire
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
(Loss) gain on equity securities	700	$ 600	1,200	$ 1,500
Quoted Prices in Active Markets for Identical Assets (Level 1) | Reported Value Measurement | Fair Value Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities cost						$ 2,000
Equity securities	4,900		4,900		6,300
Quoted Prices in Active Markets for Identical Assets (Level 1) | Reported Value Measurement | Fair Value Measurements, Recurring | Bellaire
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities cost						$ 5,000
Equity securities	$ 13,200		$ 13,200		$ 12,300