Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Class A Common Stock Common Stock.	Class B Common Stock Common Stock.	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Total
Balance at Dec. 31, 2020	$ 68	$ 9	$ 68,900	$ 158,990	$ (37,425)	$ 190,542
Balance (in shares) at Dec. 31, 2020	6,785	938
Net Income (Loss)	$ 0	$ 0	0	11,157		11,157
Conversion of shares from Class B to Class A	$ 0	$ 0	0
Conversion of shares from Class B to Class A (in shares)	12	(12)
Forfeiture of restricted stock	$ 0	$ 0	0
Forfeiture of restricted stock (in shares)	38	39
Dividends declared per common share	$ 0	$ 0	0	(5,901)		(5,901)
Compensation expense related to restricted stock awards	0	0	1,335			1,335
Purchase of shares held in treasury	0	0	0		(435)	(435)
401(k) plan contribution	0	0	(200)		421	221
Balance at Dec. 31, 2021	$ 68	$ 9	70,035	164,246	(37,439)	196,919
Balance (in shares) at Dec. 31, 2021	6,835	965
Net Income (Loss)	$ 0	$ 0	0	9,202		9,202
Conversion of shares from Class B to Class A	$ 9	$ (9)	0
Conversion of shares from Class B to Class A (in shares)	965	(965)
Issuance of restricted stock	$ 1	$ 0	(1)
Issuance of restricted stock (in shares)	67	0
Dividends declared per common share	$ 0	$ 0	0	(29,552)		(29,552)
Compensation expense related to restricted stock awards	0	0	1,858			1,858
Purchase of shares held in treasury	0	0	0		(147)	(147)
401(k) plan contribution	0	0	(228)		477	249
Balance at Dec. 31, 2022	$ 78	$ 0	71,664	143,896	(37,109)	178,529
Balance (in shares) at Dec. 31, 2022	7,867	0
Net Income (Loss)	$ 0	$ 0	0	9,500		9,500
Conversion of shares from Class B to Class A	$ 0	$ 0	0
Conversion of shares from Class B to Class A (in shares)	0	0
Issuance of restricted stock	$ 2	$ 0	(2)
Issuance of restricted stock (in shares)	140	0
Dividends declared per common share	$ 0	$ 0	0	(18,625)		(18,625)
Compensation expense related to restricted stock awards	0	0	1,116			1,116
Purchase of shares held in treasury	0	0	0		(227)	(227)
401(k) plan contribution	0	0	(185)		441	256
Balance at Dec. 31, 2023	$ 80	$ 0	$ 72,593	$ 134,771	$ (36,895)	$ 170,549
Balance (in shares) at Dec. 31, 2023	8,007	0