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Investment Securities (Schedule of continuous unrealized loss position for investment securities - HTM) (Details)
$ in Thousands
Sep. 30, 2019
USD ($)
security
Dec. 31, 2018
USD ($)
security
Held-to-maturity Securities [Abstract]    
Less than Twelve Months Number of individual securities | security 1 3
Twelve Months or More Number of individual securities | security 0 16
Total Number of Individual Securities | security 1 19
Less than Twelve Months, Unrealized Losses $ 0 $ 4
Twelve Months or More, Unrealized Losses 0 53
Total Unrealized Losses 0 57
Less than Twelve Months, Fair Value 340 1,039
Twelve Months or More, Fair Value 0 3,186
Fair Value $ 340 $ 4,225
Mortgage-backed securities - residential    
Held-to-maturity Securities [Abstract]    
Less than Twelve Months Number of individual securities | security [1] 0 0
Twelve Months or More Number of individual securities | security [1] 0 1
Total Number of Individual Securities | security [1] 0 1
Less than Twelve Months, Unrealized Losses [1] $ 0 $ 0
Twelve Months or More, Unrealized Losses [1] 0 1
Total Unrealized Losses [1] 0 1
Less than Twelve Months, Fair Value [1] 0 0
Twelve Months or More, Fair Value [1] 0 165
Fair Value [1] $ 0 $ 165
State and political subdivisions    
Held-to-maturity Securities [Abstract]    
Less than Twelve Months Number of individual securities | security 1 3
Twelve Months or More Number of individual securities | security 0 15
Total Number of Individual Securities | security 1 18
Less than Twelve Months, Unrealized Losses $ 0 $ 4
Twelve Months or More, Unrealized Losses 0 52
Total Unrealized Losses 0 56
Less than Twelve Months, Fair Value 340 1,039
Twelve Months or More, Fair Value 0 3,021
Fair Value $ 340 $ 4,060
[1] Aggregate unrealized loss position of these securities is less than $500.