Short-term Borrowings (Schedule of Weighted Average Daily Amounts of Borrowings Outstanding) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Short-term Debt [Abstract]
Average Daily Amounts Outstanding	$ 40,543	$ 35,576	$ 22,841	$ 31,372
Weighted Average Interest Rates	1.13%	1.24%	1.14%	1.63%