Consolidated Statements of Equity - USD ($) $ in Thousands	Common Stock Class B Common Stock	Common Stock	Additional Paid-in Capital.	Retained Earnings	Total
Balance at Dec. 31, 2020		$ 427	$ 158,859	$ 9,809	$ 169,095
Shares surrendered for withholding taxes		(1)	(538)		(539)
Stock-based compensation		15	5,245		5,260
Cash dividends declared				(2,501)	(2,501)
Net income				39,759	39,759
Balance at Dec. 31, 2021		441	163,566	47,067	211,074
Shares surrendered for withholding taxes		(2)	(3,181)		(3,183)
Stock options exercised			107		107
Stock-based compensation		3	8,219		8,222
Cash dividends declared				(23,064)	(23,064)
Net income				116,042	116,042
Balance at Dec. 31, 2022		442	168,711	140,045	309,198
Shares surrendered for withholding taxes	$ (1)	(6)	(7,310)		(7,317)
Stock options exercised		1	(1)
Stock-based compensation		3	12,902		12,905
Cash dividends declared					(27,500)
Stock dividend declared and distributed	89		102,831	(102,920)
Cash dividends and dividend equivalents declared				(27,494)	(27,494)
Net income				82,313	82,313
Balance at Dec. 31, 2023	$ 88	$ 440	$ 277,133	$ 91,944	$ 369,605