CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Class A Common Stock	Additional paid-in Capital	Retained Earnings	Treasury Stock
Balance at Dec. 31, 2019	$ 162,195	$ 124	$ 55,869	$ 106,202
Net income	8,168			8,168
Issuance of common stock	118		118
Cash dividends	(3,734)			(3,734)
Balance at Sep. 30, 2020	166,747	124	55,987	110,636
Balance at Jun. 30, 2020	166,160	124	55,987	110,049
Net income	1,832			1,832
Cash dividends	(1,245)			(1,245)
Balance at Sep. 30, 2020	166,747	124	55,987	110,636
Balance at Dec. 31, 2020	167,656	124	55,987	111,545
Net income	13,437			13,437
Issuance of common stock	104		104
Cash dividends	(7,452)			(7,452)
Treasury stock:
Acquired	(755)				$ (755)
Retired			(755)		$ 755
Balance at Sep. 30, 2021	172,990	124	55,336	117,530
Balance at Jun. 30, 2021	171,339	124	55,336	115,879
Net income	4,132			4,132
Cash dividends	(2,481)			(2,481)
Balance at Sep. 30, 2021	$ 172,990	$ 124	$ 55,336	$ 117,530