CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Total
Beginning balance at Dec. 31, 2020	$ 28	$ 190,920	$ (2,163)	$ 621,626
Common stock issued under employee stock plans	1	3,651
Repurchase of common stock	0	0
Stock-based compensation		8,480
Other comprehensive loss			(673)		$ (673)
Net income				39,798	39,798
Payment of dividends to stockholders				(7,845)
Ending balance at Mar. 31, 2021	29	203,051	(2,836)	653,579	853,823
Beginning balance at Dec. 31, 2021	28	162,301	(3,737)	753,440	912,032
Common stock issued under employee stock plans	0	3,057
Repurchase of common stock	(2)	(134,687)			(134,700)
Stock-based compensation		9,013
Other comprehensive loss			(4,432)		(4,432)
Net income				46,248	46,248
Payment of dividends to stockholders				(10,656)
Ending balance at Mar. 31, 2022	$ 26	$ 39,684	$ (8,169)	$ 789,032	$ 820,573