Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Earnings (Loss)	Retained Earnings (Accumulated Deficit)
Balance (in shares) at Dec. 31, 2018		52,316,583
Balance at Dec. 31, 2018	$ 453,023	$ 52	$ 369,637	$ (3,158)	$ 86,492
Increase (Decrease) in Stockholders' Equity
Share-based compensation	14,846		14,846
Issuance of common stock in connection with the Company’s equity award plans (in shares)		216,765
Issuance of common stock in connection with the Company’s equity award plans	3,928	$ 1	3,927
Net earnings	113,056				113,056
Unrealized gain (loss) on marketable securities, net of tax	10,575			10,575
Balance (in shares) at Dec. 31, 2019		52,533,348
Balance at Dec. 31, 2019	595,428	$ 53	388,410	7,417	199,548
Increase (Decrease) in Stockholders' Equity
Share-based compensation	16,561		16,561
Issuance of common stock in connection with the Company’s equity award plans (in shares)		335,134
Issuance of common stock in connection with the Company’s equity award plans	4,361		4,361
Net earnings	126,950				126,950
Unrealized gain (loss) on marketable securities, net of tax	1,558			1,558
Balance (in shares) at Dec. 31, 2020		52,868,482
Balance at Dec. 31, 2020	744,858	$ 53	409,332	8,975	326,498
Increase (Decrease) in Stockholders' Equity
Share-based compensation	17,910		17,910
Issuance of common stock in connection with the Company’s equity award plans (in shares)		387,612
Issuance of common stock in connection with the Company’s equity award plans	7,095		7,095
Net earnings	53,424
Unrealized gain (loss) on marketable securities, net of tax	(7,436)			(7,436)
Balance (in shares) at Dec. 31, 2021		53,256,094
Balance at Dec. 31, 2021	$ 815,851	$ 53	$ 434,337	$ 1,539	$ 379,922