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Investment Securities, Held-to-maturity Securities, Maturity (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Amortized Cost [Abstract]    
Amortized Cost $ 13,824 $ 18,618
Fair Value [Abstract]    
Fair Value 14,988 19,680
Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 months - Fair value 0 0
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 13,824  
Amortized Cost 13,824 18,618
Fair Value [Abstract]    
Securities, fair value 14,988  
Fair Value $ 14,988 $ 19,680