Consolidated Statements of Comprehensive Earnings - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net earnings	$ 1,316	$ 60,711	$ 53,424
Other comprehensive gain (loss):
Unrealized gain (loss) on marketable securities, net of tax	2,617	(4,749)	(7,436)
Other comprehensive gain (loss)	2,617	(4,749)	(7,436)
Comprehensive earnings	$ 3,933	$ 55,962	$ 45,988