Short-term Borrowings (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Short-term Debt [Line Items]
Maturity of federal funds purchased from correspondent banks	one business day
Current borrowing available	$ 490,048,000
Real estate secured loans	1,222,193,000
Maximum borrowing capacity	852,568,000
Short-term borrowings	125,617,000
Paycheck Protection Program Liquidity Facility [Member]
Short-term Debt [Line Items]
Short-term borrowings	$ 125,617,000	$ 0
Short-term borrowings, term	five years
Short-term borrowings, interest Rate	0.35%
Other Correspondent Banks [Member]
Short-term Debt [Line Items]
Outstanding drawings	$ 0	0
Line of credit facility, remaining borrowing capacity	35,000,000
Short-term borrowings	0	0
FHLB Short-Term Borrowings [Member]
Short-term Debt [Line Items]
Outstanding drawings	$ 0	$ 0