Fair Value (Reconciliation of all Assets Measured at Fair Value on a Recurring Basis, Using Significant Unobservable Inputs (Level 3)) (Details) - Fair Value, Measurements, Recurring - Obligations of State and Political Subdivisions - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance of Recurring Level 3 Assets at January 1	$ 4,991	$ 5,649
Total Gains or Losses Included in Other Comprehensive Income	(25)	(69)
Maturities / Calls	(945)	(920)
Acquired through Bank Acquisition	0	331
Balance of Recurring Level 3 Assets at December 31	$ 4,021	$ 4,991