Short-Term Borrowings and Long-Term Debt (Schedule of Debt) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Long-term debt
Long-term debt outstanding at end of period	$ 0	$ 12,231
Weighted average rate on outstanding long-term debt	0.00%	0.82%
Maximum outstanding long-term debt of any month end	$ 12,225	$ 27,296
Average outstanding long-term debt	$ 3,848	$ 23,072
Approximate average rate paid on long-term debt	1.25%	0.95%
Short-term borrowings
Short-term borrowings outstanding at end of period	$ 79,000	$ 0
Weighted average rate on short-term borrowings	4.57%	0.00%
Maximum outstanding short-term borrowings at any month end	$ 79,000	$ 0
Average outstanding short-term borrowings	$ 12,696	$ 0
Approximate average rate paid on short-term borrowings	3.36%	0.00%