Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Consolidated Balance Sheets
Allowance for credit losses on investments	$ 218
Preferred stock, par value	$ 1	$ 1
Preferred Stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	19,914,884	19,991,681
Common stock, shares outstanding	19,914,884	19,991,681