Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Paid-In Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Treasury Stock
Beginning balance at Dec. 31, 2020	$ 488,032	$ 1,076	$ 627,031	$ (54,172)	$ 50,937	$ (136,840)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(25,526)				(25,526)
Employee stock options, restricted stock and employee stock purchase plan	(738)	17	(28)		(1,066)	339
Stock-based compensation expense	7,926		7,926
Foreign currency translation, net of tax	(7,308)			(7,308)
Recognition of Chile cumulative foreign currency translation losses	0
Ending balance at Dec. 31, 2021	462,386	1,093	634,929	(61,480)	24,345	(136,501)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(20,834)				(20,834)
Employee stock options, restricted stock and employee stock purchase plan	(2,061)	22	(524)		(1,022)	(537)
Stock-based compensation expense	6,861		6,861
Treasury shares purchased at cost	(17,618)					(17,618)
Foreign currency translation, net of tax	(5,706)			(5,706)
Recognition of Chile cumulative foreign currency translation losses	0
Ending balance at Dec. 31, 2022	423,028	1,115	641,266	(67,186)	2,489	(154,656)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	14,516				14,516
Employee stock options, restricted stock and employee stock purchase plan	(980)	2	(8,259)		(6,232)	13,509
Stock-based compensation expense	6,638		6,638
Treasury shares purchased at cost	(32,185)					(32,185)
Foreign currency translation, net of tax	3,549			3,549
Recognition of Chile cumulative foreign currency translation losses	798			798
Ending balance at Dec. 31, 2023	$ 415,364	$ 1,117	$ 639,645	$ (62,839)	$ 10,773	$ (173,332)