Consolidated Statements of Comprehensive Earnings - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net earnings	$ 60,711	$ 53,424	$ 126,950
Other comprehensive loss:
Unrealized (loss) gain on marketable securities, net of tax	(4,749)	(7,436)	1,558
Other comprehensive (loss) earnings, net of tax	(4,749)	(7,436)	1,558
Comprehensive earnings	$ 55,962	$ 45,988	$ 128,508