UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2020		24,418,939
Beginning balance at Dec. 31, 2020	$ 1,748,319	$ 244	$ 1,519,549	$ 179,646	$ 48,880
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	8,068		8,035	33
Exercise of stock options, net (in shares)		1,632
Exercise of stock options, net	113		113
Issuance of restricted stock, net (in shares)		238,034
Issuance of restricted stock, net	(2,340)	$ 2	(2,342)
Repurchase of common stock (in shares)		(37,494)
Repurchase of common stock	(2,904)	$ 0	(2,333)	(571)
Common stock dividends	(29,572)			(29,572)
Foreign currency translation adjustment	(17,988)				(17,988)
Unrealized gains (losses) on marketable securities, net of tax	(69)				(69)
Net income	29,553			29,553
Ending balance (in shares) at Jun. 30, 2021		24,621,111
Ending balance at Jun. 30, 2021	1,733,180	$ 246	1,523,022	179,089	30,823
Beginning balance (in shares) at Mar. 31, 2021		24,651,205
Beginning balance at Mar. 31, 2021	1,735,925	$ 247	1,521,145	174,469	40,064
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	4,168		4,167	1
Exercise of stock options, net (in shares)		833
Exercise of stock options, net	43		43
Issuance of restricted stock, net (in shares)		6,567
Issuance of restricted stock, net	(1)	$ (1)
Repurchase of common stock (in shares)		(37,494)
Repurchase of common stock	(2,904)		(2,333)	(571)
Common stock dividends	(14,786)			(14,786)
Foreign currency translation adjustment	(9,276)				(9,276)
Unrealized gains (losses) on marketable securities, net of tax	35				35
Net income	19,976			19,976
Ending balance (in shares) at Jun. 30, 2021		24,621,111
Ending balance at Jun. 30, 2021	1,733,180	$ 246	1,523,022	179,089	30,823
Beginning balance (in shares) at Dec. 31, 2021		24,592,098
Beginning balance at Dec. 31, 2021	1,713,990	$ 246	1,529,969	174,572	9,203
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	10,597		10,597	0
Issuance of restricted stock, net (in shares)		438,206
Issuance of restricted stock, net	(2,778)	$ 4	(2,782)
Repurchase of common stock (in shares)		(393,036)
Repurchase of common stock	(24,972)	$ (4)	(24,275)	(693)
Common stock dividends	(29,953)			(29,953)
Foreign currency translation adjustment	(36,506)				(36,506)
Unrealized gains (losses) on marketable securities, net of tax	(706)				(706)
Net income	22,249			22,249
Ending balance (in shares) at Jun. 30, 2022		24,637,268
Ending balance at Jun. 30, 2022	1,651,921	$ 246	1,513,509	166,175	(28,009)
Beginning balance (in shares) at Mar. 31, 2022		24,963,542
Beginning balance at Mar. 31, 2022	1,724,313	$ 250	1,528,328	166,550	29,185
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	5,529		5,529	0
Issuance of restricted stock, net (in shares)		260
Issuance of restricted stock, net	(34)	$ (1)	(33)
Repurchase of common stock (in shares)		(326,534)
Repurchase of common stock	(21,011)	$ (3)	(20,315)	(693)
Common stock dividends	(14,902)			(14,902)
Foreign currency translation adjustment	(57,005)				(57,005)
Unrealized gains (losses) on marketable securities, net of tax	(189)				(189)
Net income	15,220			15,220
Ending balance (in shares) at Jun. 30, 2022		24,637,268
Ending balance at Jun. 30, 2022	$ 1,651,921	$ 246	$ 1,513,509	$ 166,175	$ (28,009)