Stockholders' Equity - Summary of Reconciliation of Changes in Stockholders' Equity (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 394,139	$ 394,179	$ 364,425	$ 344,432	$ 364,913	$ 380,533	$ 364,425	$ 380,533
Common stock issued upon exercise of options	10		66		0	15
Purchase and retirement of common shares	(200)	(460)	(1,203)	(54)	(905)	(1,049)
Stock-based compensation	2,590	2,357	2,655	2,296	3,280	3,524
Net income	11,159	(4,796)	27,219	5,595	(18,589)	(19,940)	33,582	(32,934)
Currency translation adjustments	(2,813)	2,859	797	(9,828)	(4,349)	1,756	843	(12,421)
Unrealized gain on marketable securities	0		220	11	82	74	220	167
Ending Balance	$ 404,885	$ 394,139	$ 394,179	$ 342,452	$ 344,432	$ 364,913	$ 404,885	$ 342,452
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)	73,413	73,254	72,734	72,572	72,307	72,069	72,734	72,069
Common stock issued upon exercise of options (in shares)	2		12		407	2
Vesting of restricted stock and performance stock units (in shares)	99	241	737	66		352
Purchase and retirement of common shares (in shares)	(31)	(82)	(229)	(19)	(142)	(116)
Ending balance (in shares)	73,483	73,413	73,254	72,619	72,572	72,307	73,483	72,619
Additional Paid-in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 523,861	$ 521,964	$ 520,446	$ 515,928	$ 513,553	$ 511,063	$ 520,446	$ 511,063
Common stock issued upon exercise of options	10		66			15
Purchase and retirement of common shares	(200)	(460)	(1,203)	(54)	(905)	(1,049)
Stock-based compensation	2,590	2,357	2,655	2,296	3,280	3,524
Ending Balance	526,261	523,861	521,964	518,170	515,928	513,553	526,261	518,170
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(14,559)	(17,418)	(18,435)	(12,514)	(8,247)	(10,077)	(18,435)	(10,077)
Currency translation adjustments		2,859	797	(9,828)	(4,349)	1,756
Unrealized gain on marketable securities			220	11	82	74
Ending Balance	(17,372)	(14,559)	(17,418)	(22,331)	(12,514)	(8,247)	(17,372)	(22,331)
Accumulated Deficit
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(115,163)	(110,367)	(137,586)	(158,982)	(140,393)	(120,453)	(137,586)	(120,453)
Net income			27,219	5,595	(18,589)	(19,940)
Ending Balance	$ (104,004)	$ (115,163)	$ (110,367)	$ (153,387)	$ (158,982)	$ (140,393)	$ (104,004)	$ (153,387)