Investments (Aggregate Carrying And Approximate Market Values Of Held-To-Maturity Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Schedule of Held-to-maturity Securities [Line Items]
Securities Held-to-Maturity, Amortized Cost	$ 55,326	$ 60,827
Securities held-to-maturity, Accumulated Unrecognized Holding Gain	858	173
Securities held-to-maturity, Accumulated Unrecognized Holding Loss	99	294
Securities held-to-maturity, Estimated Fair Value	56,085	60,706
U.S. Government Agencies Mortgage-backed Securities
Schedule of Held-to-maturity Securities [Line Items]
Securities Held-to-Maturity, Amortized Cost	55,326	56,827
Securities held-to-maturity, Accumulated Unrecognized Holding Gain	858	173
Securities held-to-maturity, Accumulated Unrecognized Holding Loss	99	294
Securities held-to-maturity, Estimated Fair Value	$ 56,085	56,706
Trust Preferred Securities
Schedule of Held-to-maturity Securities [Line Items]
Securities Held-to-Maturity, Amortized Cost		4,000
Securities held-to-maturity, Accumulated Unrecognized Holding Gain		0
Securities held-to-maturity, Accumulated Unrecognized Holding Loss		0
Securities held-to-maturity, Estimated Fair Value		$ 4,000