Long-Term Debt and Short-Term Borrowings, Line of Credit Borrowings (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($) Bank
Line of Credit Facility [Abstract]
Average borrowings outstanding	$ 11,487	$ 7,467
Weighted average cost of borrowings	1.30%	1.59%
Weighted average interest rate at year end	1.30%	1.30%
Outstanding borrowings	$ 149,190	$ 126,570
Committed Line of Credit, due 2023 [Member]
Line of Credit Facility [Abstract]
Borrowing capacity	50,000
Outstanding borrowings	29,320	6,700
Committed Line of Credit, due 2023 [Member] | Accounts Payable [Member]
Line of Credit Facility [Abstract]
Cash overdraft	$ 1,746	1,263
Committed Line of Credit, due 2023 [Member] | LIBOR [Member]
Line of Credit Facility [Abstract]
Basis adjustment	1.05%
Prior Line of Credit Agreements [Member]
Line of Credit Facility [Abstract]
Borrowing capacity		$ 41,500
Number of banks in which unsecured line of credit maintained | Bank		4