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Investment Securities (Investments Classified by Contractual Maturity Date) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost, Due in 1 year or less	$ 2,250
Available-for-sale Securities, Amortized Cost, Due in 1 year or less	6,109
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis, Total	8,359
Available-for-sale debt securities, Amortized Cost	8,361	$ 37,170
Available-for-sale Securities, Fair Value, Due after 1 year but within 5 years	2,250
Available-for-sale Securities, Fair Value, Due after 5 years but within 10 years	6,085
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Fair Value, Total	8,335
Available-for-sale debt securities, Fair Value	8,337	37,009
Held-to-maturity, Due in 1 year or less, Amortized Cost	3,159
Held-to-maturity, Due after 1 year through 5 years, Amortized Cost	26,249
Held-to-maturity, Due after 5 years through 10 years, Amortized Cost	62,051
Held-to-maturity, Due after 10 years, Amortized Cost	3,222
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis	94,681
Held-to-maturity debt securities, Amortized Cost	140,474	136,477
Held-to-maturity, Due in 1 year or less, Fair Value	3,176
Held-to-maturity, Due after 1 year through 5, Fair Value	27,288
Held-to-maturity, Due after 5 years through 10 years, Fair Value	64,196
Held-to-maturity, Due after 10 years, Fair Value	3,271
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Fair Value	97,931
Held-to-maturity, Fair Value	144,708	$ 137,476
Mortgage-backed securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities without a Single Maturity Date, Amortized Cost	2
Available-for-sale securities without a Single Maturity Date, Fair Value	2
Held-to-maturity without Single Maturity Date, Amortized Cost	45,793
Held-to-maturity without Single Maturity Date, Fair Value	$ 46,777

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