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Investments (Held-To-Maturity Securities Disclosure) (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost $ 42,057 $ 42,150
Net Unrealized Gains (Losses) (41) (21)
HTM, Carrying Value 42,016 42,129
Unrecognized Holding Gains 1,482 2,026
Unrecognized Holding Losses (125) (55)
Held-to-maturity securities, fair value 43,373 44,100
Obligations of States and Political Subdivisions [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 22,490 25,154
Net Unrealized Gains (Losses) 49 84
HTM, Carrying Value 22,539 25,238
Unrecognized Holding Gains 721 1,023
Unrecognized Holding Losses 0 0
Held-to-maturity securities, fair value 23,260 26,261
Corporate Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 19,567 16,996
Net Unrealized Gains (Losses) (90) (105)
HTM, Carrying Value 19,477 16,891
Unrecognized Holding Gains 761 1,003
Unrecognized Holding Losses (125) (55)
Held-to-maturity securities, fair value $ 20,113 $ 17,839