Consolidated Statements of Stockholder's Equity Statement - USD ($) $ in Thousands	Total	Retained Earnings (Accumulated Deficit)	Accumulated other comprehensive income [Member]	Treasury Stock, Common [Member]	Common Stock Class A [Member] Common stock [Member]	Common Stock Class B [Member] Common stock [Member]
Balance at Dec. 31, 2021	$ 99,957	$ (9,698)	$ (138,989)	$ (20,101)	$ 265,561	$ 3,184
Net income (loss)	6,449	6,449	0	0	0	0
Other comprehensive income (loss)	17,189	0	17,189	0	0	0
Total comprehensive income (loss)	23,638	6,449	17,189	0	0	0
Common stock issuance	1,788	0	0	0	1,788	0
Stock-based compensation	93	0	0	0	93	0
Balance at Mar. 31, 2022	125,476	(3,249)	(121,800)	(20,101)	267,442	3,184
Balance at Dec. 31, 2022	127,790	16,309	(137,044)	(22,806)	268,147	3,184
Net income (loss)	4,872	4,872	0	0	0	0
Other comprehensive income (loss)	21,579	0	21,579	0	0	0
Total comprehensive income (loss)	26,451	4,872	21,579	0	0	0
Stock-based compensation	50	0	0	0	50	0
Balance at Mar. 31, 2023	$ 154,291	$ 21,181	$ (115,465)	$ (22,806)	$ 268,197	$ 3,184