Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Accounts receivable, less allowances	$ 4,931	$ 3,744
Common stock, par value	$ 2	$ 2
Common stock, shares authorized	15,000,000	15,000,000
Common stock, shares issued	4,940,578	4,907,143
Common stock, shares outstanding	4,940,578	4,907,143
Common stock, shares issued to rabbi trust	244,969	243,138
Treasury stock shares	1,714,822	1,685,387