CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
Beginning balance at Dec. 31, 2020	$ 606,224	$ 357,803	$ (5,452)	$ 958,575
Beginning balance (in shares) at Dec. 31, 2020	55,623
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		10,958		10,958
Other comprehensive income (loss)			(1,730)	(1,730)
Stock-based compensation expense	$ 3,310			3,310
Options exercised	$ 5,897			5,897
Options exercised (in shares)	291
Issuance of common stock under Employee Stock Purchase Plan	$ 263			263
Issuance of common stock under Employee Stock Purchase Plans (in shares)	5
Shares issued from time-vested restricted stock units (in shares)	25
Shares surrendered in exchange for payment of payroll tax liabilities	$ (488)			(488)
Shares surrendered in exchange for payment of payroll tax liabilities (in shares)	(9)
Shares surrendered in exchange for exercise of stock options	$ (93)			(93)
Shares surrendered in exchange for exercise of stock options (in shares)	(2)
Ending balance at Mar. 31, 2021	$ 615,113	368,761	(7,182)	976,692
Ending balance (in shares) at Mar. 31, 2021	55,933
Beginning balance at Dec. 31, 2020	$ 606,224	357,803	(5,452)	958,575
Beginning balance (in shares) at Dec. 31, 2020	55,623
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				15,874
Other comprehensive income (loss)				618
Shares surrendered in exchange for exercise of stock options				(93)
Ending balance at Jun. 30, 2021	$ 623,591	373,677	(4,834)	992,434
Ending balance (in shares) at Jun. 30, 2021	56,224
Beginning balance at Mar. 31, 2021	$ 615,113	368,761	(7,182)	976,692
Beginning balance (in shares) at Mar. 31, 2021	55,933
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		4,916		4,916
Other comprehensive income (loss)			2,348	2,348
Stock-based compensation expense	$ 2,765			2,765
Options exercised	$ 5,455			5,455
Options exercised (in shares)	253
Issuance of common stock under Employee Stock Purchase Plan	$ 258			258
Issuance of common stock under Employee Stock Purchase Plans (in shares)	4
Shares issued from time-vested restricted stock units (in shares)	34
Ending balance at Jun. 30, 2021	$ 623,591	373,677	(4,834)	992,434
Ending balance (in shares) at Jun. 30, 2021	56,224
Beginning balance at Dec. 31, 2021	$ 641,533	406,257	(7,991)	$ 1,039,799
Beginning balance (in shares) at Dec. 31, 2021	56,570			56,570
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		10,545		$ 10,545
Other comprehensive income (loss)			1,338	1,338
Stock-based compensation expense	$ 4,212			4,212
Options exercised	$ 1,320			1,320
Options exercised (in shares)	52
Issuance of common stock under Employee Stock Purchase Plan	$ 320			320
Issuance of common stock under Employee Stock Purchase Plans (in shares)	5
Shares issued from time-vested restricted stock units (in shares)	44
Shares surrendered in exchange for payment of payroll tax liabilities	$ (1,015)			(1,015)
Shares surrendered in exchange for payment of payroll tax liabilities (in shares)	(16)
Ending balance at Mar. 31, 2022	$ 646,370	416,802	(6,653)	1,056,519
Ending balance (in shares) at Mar. 31, 2022	56,655
Beginning balance at Dec. 31, 2021	$ 641,533	406,257	(7,991)	$ 1,039,799
Beginning balance (in shares) at Dec. 31, 2021	56,570			56,570
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				$ 25,843
Other comprehensive income (loss)				(2,728)
Ending balance at Jun. 30, 2022	$ 651,926	432,100	(10,719)	$ 1,073,307
Ending balance (in shares) at Jun. 30, 2022	56,745			56,745
Beginning balance at Mar. 31, 2022	$ 646,370	416,802	(6,653)	$ 1,056,519
Beginning balance (in shares) at Mar. 31, 2022	56,655
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		15,298		15,298
Other comprehensive income (loss)			(4,066)	(4,066)
Stock-based compensation expense	$ 3,952			3,952
Options exercised	$ 1,303			1,303
Options exercised (in shares)	58
Issuance of common stock under Employee Stock Purchase Plan	$ 301			301
Issuance of common stock under Employee Stock Purchase Plans (in shares)	6
Shares issued from time-vested restricted stock units (in shares)	26
Ending balance at Jun. 30, 2022	$ 651,926	$ 432,100	$ (10,719)	$ 1,073,307
Ending balance (in shares) at Jun. 30, 2022	56,745			56,745