Short-term Borrowings (Schedule of Weighted Average Daily Amounts of Borrowings Outstanding) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Short-term Debt [Abstract]
Average Daily Amounts Outstanding	$ 35,576	$ 58,259	$ 31,372	$ 56,881
Weighted Average Interest Rates	1.24%	3.26%	1.63%	3.45%