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Investment Securities, Held-to-maturity Securities, Maturity (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Amortized Cost [Abstract]    
Amortized Cost $ 22,501 $ 27,551
Fair Value [Abstract]    
Fair value 22,924 28,701
Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 months - Fair value 11,000  
Less than 12 months - Gross unrealized Loss 154  
Sales and transfers of held to maturity securities 0 0
Mortgage-Backed Securities and Collateralized Mortgage Obligations-Residential [Member]    
Amortized Cost [Abstract]    
Securities, amortized cost 22,501  
Amortized Cost 22,501 27,551
Fair Value [Abstract]    
Securities, fair value 22,924  
Fair value $ 22,924 $ 28,701