Investment Securities (Amortized Cost And Fair Value Of Debt Securities By Contractual Maturity Date) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Held-to-maturity Securities And Available-for-sale Securities [Line Items]
Amortized cost: Due in one year or less	$ 9,287
Amortized cost: Due after one year through five years	7,958
Amortized cost: Due after five years through ten years	3,582
Amortized cost: Due after ten years	36,702
Amortized cost: MBS - GSE residential	126,667
Amortized cost: Total available-for-sale debt securities	184,196	$ 154,806
Fair value: Due in one year or less	9,339
Fair value: Due after one year through five years	8,067
Fair value: Due after five years through ten years	3,592
Fair value: Due after ten years	37,494
Fair value: MBS - GSE residential	124,318
Fair value: Total available-for-sale debt securities	182,810	156,557
MBS - GSE Residential [Member]
Schedule of Held-to-maturity Securities And Available-for-sale Securities [Line Items]
Amortized cost: Total available-for-sale debt securities	126,667	103,386
Fair value: Total available-for-sale debt securities	$ 124,318	$ 103,152