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Investments (Amortized Cost and Fair Values Classified by Contractual Maturity Date) (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Schedule of Investments [Line Items]    
Amortized Cost: Due in one year or less $ 227  
Amortized Cost: Due after one year through five years 16,768  
Amortized Cost: Due after five years through ten years 21,799  
Amortized Cost: Due after ten years 29,366  
Amortized Cost: Sub Total 68,160  
Fair Value: Due in one year or less 228  
Fair Value: Due after one year through five years 16,614  
Fair Value: Due after five years through ten years 21,388  
Fair Value: Due after ten years 26,303  
Available For Sale Debt Maturities Fair Value Sub Total 64,533  
Available-for-sale Securities, Amortized Cost Basis 141,865 $ 144,123
Available-for-sale Securities 136,514 137,641
Amortized Cost: Due after one year through five years, Held to maturity 8,363  
Amortized Cost: Due after five years through ten years, Held to maturity 7,691  
Amortized Cost: Due after ten years, Held to maturity 14,674  
Amortized Cost: Total, Held to maturity 30,728  
Fair Value: Due after one year through five years, Held to maturity 8,556  
Fair Value: Due after five years through ten years, Held to maturity 7,899  
Fair Value: Due after ten years, Held to maturity 16,600  
Fair Value: Total, Held to maturity 33,055  
Held-to-maturity securities 95,538 94,010
Held-to-maturity securities, fair value 97,364 93,760
Residential mortgage-backed agencies [Member]    
Schedule of Investments [Line Items]    
Held-to-maturity securities 45,312 46,491
Held-to-maturity securities, fair value 44,660 45,210
Commercial mortgage-backed agencies [Member]    
Schedule of Investments [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 38,141 39,013
Available-for-sale Securities 36,976 37,752
Held-to-maturity securities 15,745 15,821
Held-to-maturity securities, fair value 15,958 15,828
Collateralized mortgage obligations [Member]    
Schedule of Investments [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 35,564 36,669
Available-for-sale Securities 35,005 35,704
Held-to-maturity securities 3,753 3,761
Held-to-maturity securities, fair value $ 3,691 $ 3,605