Investments (Aggregate Carrying And Approximate Market Values Of Held-To-Maturity Securities) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity, Amortized Cost	$ 49,036	$ 60,827
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	1,562	173
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	0	294
Securities held-to-maturity, Estimated Fair Value	50,598	60,706
US Government Agencies Debt Securities
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity, Amortized Cost	49,036	56,827
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	1,562	173
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	0	294
Securities held-to-maturity, Estimated Fair Value	50,598	56,706
Trust preferred securities
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity, Amortized Cost	0	4,000
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	0	0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	0	0
Securities held-to-maturity, Estimated Fair Value	$ 0	$ 4,000