Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2021		27,465,945
Beginning balance at Dec. 31, 2021	$ 828,493	$ 28	$ 468,548	$ 376,734	$ (16,817)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)		27,716
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	(462)		(462)
Stock-based compensation expense	4,397		4,397
Net income	5,095			5,095
Other comprehensive income (loss)
Foreign currency translation adjustment	(4,972)				(4,972)
Net unrealized gains (losses) on investments in securities	(516)				(516)
Comprehensive income	(393)
Ending balance (in shares) at Mar. 31, 2022		27,493,661
Ending balance at Mar. 31, 2022	832,035	$ 28	472,483	381,829	(22,305)
Beginning balance (in shares) at Dec. 31, 2021		27,465,945
Beginning balance at Dec. 31, 2021	828,493	$ 28	468,548	376,734	(16,817)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	11,603
Other comprehensive income (loss)
Comprehensive income	(18,604)
Ending balance (in shares) at Sep. 30, 2022		27,326,750
Ending balance at Sep. 30, 2022	810,846	$ 28	477,107	380,735	(47,024)
Beginning balance (in shares) at Mar. 31, 2022		27,493,661
Beginning balance at Mar. 31, 2022	832,035	$ 28	472,483	381,829	(22,305)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)		122,705
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	1,158		1,158
Stock-based compensation expense	4,031		4,031
Repurchases of common stock and other (in shares)		(113,266)
Repurchases of common stock and other	(5,239)		(1,932)	(3,307)
Net income	2,557			2,557
Other comprehensive income (loss)
Foreign currency translation adjustment	(13,515)				(13,515)
Net unrealized gains (losses) on investments in securities	(329)				(329)
Comprehensive income	(11,287)
Ending balance (in shares) at Jun. 30, 2022		27,503,100
Ending balance at Jun. 30, 2022	820,698	$ 28	475,740	381,079	(36,149)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)		31,150
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	0		0
Stock-based compensation expense	4,907		4,907
Repurchases of common stock and other (in shares)		(207,500)
Repurchases of common stock and other	(7,835)		(3,540)	(4,295)
Net income	3,951			3,951
Other comprehensive income (loss)
Foreign currency translation adjustment	(10,287)				(10,287)
Net unrealized gains (losses) on investments in securities	(588)				(588)
Comprehensive income	(6,924)
Ending balance (in shares) at Sep. 30, 2022		27,326,750
Ending balance at Sep. 30, 2022	$ 810,846	$ 28	477,107	380,735	(47,024)
Beginning balance (in shares) at Dec. 31, 2022	26,888,425	26,888,425
Beginning balance at Dec. 31, 2022	$ 697,648	$ 27	473,740	258,236	(34,355)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)		26,798
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	(401)		(401)
Stock-based compensation expense	3,695		3,695
Repurchases of common stock and other (in shares)		(712,500)
Repurchases of common stock and other	(21,325)	$ (1)	(11,849)	(9,475)
Net income	2,659			2,659
Other comprehensive income (loss)
Foreign currency translation adjustment	527				527
Net unrealized gains (losses) on investments in securities	334				334
Comprehensive income	3,520
Ending balance (in shares) at Mar. 31, 2023		26,202,723
Ending balance at Mar. 31, 2023	$ 683,137	$ 26	465,185	251,420	(33,494)
Beginning balance (in shares) at Dec. 31, 2022	26,888,425	26,888,425
Beginning balance at Dec. 31, 2022	$ 697,648	$ 27	473,740	258,236	(34,355)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	10,230
Other comprehensive income (loss)
Comprehensive income	$ 14,297
Ending balance (in shares) at Sep. 30, 2023	25,785,903	25,785,903
Ending balance at Sep. 30, 2023	$ 684,922	$ 26	463,908	251,276	(30,288)
Beginning balance (in shares) at Mar. 31, 2023		26,202,723
Beginning balance at Mar. 31, 2023	683,137	$ 26	465,185	251,420	(33,494)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)		169,229
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	962		962
Stock-based compensation expense	3,675		3,675
Repurchases of common stock and other (in shares)		(276,518)
Repurchases of common stock and other	(8,979)		(4,872)	(4,107)
Net income	(383)			(383)
Other comprehensive income (loss)
Foreign currency translation adjustment	4,254				4,254
Net unrealized gains (losses) on investments in securities	19				19
Comprehensive income	3,890
Ending balance (in shares) at Jun. 30, 2023		26,095,434
Ending balance at Jun. 30, 2023	682,685	$ 26	464,950	246,930	(29,221)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)		1,037
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	(11)		(11)
Stock-based compensation expense	4,441		4,441
Repurchases of common stock and other (in shares)		(310,568)
Repurchases of common stock and other	(9,080)		(5,472)	(3,608)
Net income	7,954			7,954
Other comprehensive income (loss)
Foreign currency translation adjustment	(1,307)				(1,307)
Net unrealized gains (losses) on investments in securities	240				240
Comprehensive income	$ 6,887
Ending balance (in shares) at Sep. 30, 2023	25,785,903	25,785,903
Ending balance at Sep. 30, 2023	$ 684,922	$ 26	$ 463,908	$ 251,276	$ (30,288)