Long-Term Debt (Narrative) (Details) - USD ($) $ in Thousands		12 Months Ended
	Jun. 09, 2020	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Notes payable aggregate principal amount		$ 215,924
Other long-term debt maturity year		2052
Subordinated Notes [Member] | Subordinated Notes Payable, Maturing June 2060 [Member]
Debt Instrument [Line Items]
Notes payable redemption start date	Jun. 15, 2025
Notes payable interest rate	6.25%
Notes payable aggregate principal amount	$ 172,500	$ 172,500	$ 172,500
Notes payable issuance date	Jun. 09, 2020
Notes payable maturity date	Jun. 15, 2060
Notes payable beginning payment date	Sep. 15, 2020
Other Long-Term Debt [Member]
Debt Instrument [Line Items]
Notes payable aggregate principal amount		$ 43,424	$ 69,349
Notes payable agreement period		7 years