Derivatives (Equity Market Contracts Designated As Hedging Instruments) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Notional Amount Of Derivatives [Abstract]
Derivative Asset Notional Amount		$ 465,700		$ 416,700
Derivative Liability, Notional Amount	$ 206,347		$ 235,000
Equity Swap [Member]
Notional Amount Of Derivatives [Abstract]
Derivative Asset Notional Amount	4,295		7,474
Derivative Liability, Notional Amount	0		0
Derivative Notional Amount	$ 465,701		$ 416,739