Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member] Class A Common Stock [Member]	Common Stock [Member] Class B Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning balance at Dec. 31, 2022	$ 569,736	$ 5	$ 3	$ 721,307	$ (121,577)	$ (30,002)
Beginning balance (in shares) at Dec. 31, 2022		52,277,000	27,745,000
Net Income (Loss)	(1,959)				(1,959)
Issuance of common stock for acquisitions (in shares)		34,000
Repurchase and retirement of common stock	(4,256)			(4,256)
Repurchase and retirement of common stock, Shares		(91,000)
Issuance of common stock for employee stock purchase program	3,648			3,648
Issuance of common stock for employee stock purchase program (in shares)		92,000
Exercise of stock options	10,324			10,324
Exercise of stock options (in shares)		265,000
Vesting of restricted stock (in shares)		336,000
Conversion from Class B to Class A common stock		240,000	(240,000)
Stock-based compensation	22,161			22,161
Foreign currency translation, net of tax	7,232					7,232
Retirement related benefit plans, net of tax	19					19
Ending balance at Mar. 31, 2023	606,905	$ 5	$ 3	753,184	(123,536)	(22,751)
Ending balance (in shares) at Mar. 31, 2023		53,153,000	27,505,000
Beginning balance at Dec. 31, 2022	569,736	$ 5	$ 3	721,307	(121,577)	(30,002)
Beginning balance (in shares) at Dec. 31, 2022		52,277,000	27,745,000
Net Income (Loss)	(28,601)
Foreign currency translation, net of tax	(2,215)
Retirement related benefit plans, net of tax	(46)
Ending balance at Sep. 30, 2023	634,118	$ 5	$ 3	816,551	(150,178)	(32,263)
Ending balance (in shares) at Sep. 30, 2023		54,351,000	27,045,000
Beginning balance at Mar. 31, 2023	606,905	$ 5	$ 3	753,184	(123,536)	(22,751)
Beginning balance (in shares) at Mar. 31, 2023		53,153,000	27,505,000
Net Income (Loss)	(22,280)				(22,280)
Exercise of stock options	13,264			13,264
Exercise of stock options (in shares)		382,000
Vesting of restricted stock (in shares)		86,000
Conversion from Class B to Class A common stock		330,000	(330,000)
Stock-based compensation	23,736			23,736
Foreign currency translation, net of tax	(1,340)					(1,340)
Retirement related benefit plans, net of tax	(70)					(70)
Ending balance at Jun. 30, 2023	620,215	$ 5	$ 3	790,184	(145,816)	(24,161)
Ending balance (in shares) at Jun. 30, 2023		53,951,000	27,175,000
Net Income (Loss)	(4,362)				(4,362)
Issuance of common stock for acquisitions (in shares)		53,000
Issuance of common stock for employee stock purchase program	3,903			3,903
Issuance of common stock for employee stock purchase program (in shares)		91,000
Exercise of stock options	1,938			1,938
Exercise of stock options (in shares)		79,000
Vesting of restricted stock (in shares)		47,000
Conversion from Class B to Class A common stock		130,000	(130,000)
Stock-based compensation	20,526			20,526
Foreign currency translation, net of tax	(8,107)					(8,107)
Retirement related benefit plans, net of tax	5					5
Ending balance at Sep. 30, 2023	634,118	$ 5	$ 3	816,551	(150,178)	(32,263)
Ending balance (in shares) at Sep. 30, 2023		54,351,000	27,045,000
Beginning balance at Dec. 31, 2023	711,331	$ 5	$ 3	864,135	(130,503)	(22,309)
Beginning balance (in shares) at Dec. 31, 2023		55,240,000	26,814,000
Net Income (Loss)	16,547				16,547
Issuance of common stock for acquisitions	75			75
Issuance of common stock for acquisitions (in shares)		35,000
Issuance of common stock for employee stock purchase program	4,127			4,127
Issuance of common stock for employee stock purchase program (in shares)		64,000
Exercise of stock options	19,844			19,844
Exercise of stock options (in shares)		540,000
Vesting of restricted stock (in shares)		303,000
Conversion from Class B to Class A common stock		730,000	(730,000)
Stock-based compensation	15,999			15,999
Foreign currency translation, net of tax	(5,029)					(5,029)
Retirement related benefit plans, net of tax	34					34
Ending balance at Mar. 31, 2024	762,928	$ 5	$ 3	904,180	(113,956)	(27,304)
Ending balance (in shares) at Mar. 31, 2024		56,912,000	26,084,000
Beginning balance at Dec. 31, 2023	711,331	$ 5	$ 3	864,135	(130,503)	(22,309)
Beginning balance (in shares) at Dec. 31, 2023		55,240,000	26,814,000
Net Income (Loss)	13,179
Foreign currency translation, net of tax	4,542
Retirement related benefit plans, net of tax	148
Ending balance at Sep. 30, 2024	836,900	$ 5	$ 3	971,835	(117,324)	(17,619)
Ending balance (in shares) at Sep. 30, 2024		59,518,000	25,432,000
Beginning balance at Mar. 31, 2024	762,928	$ 5	$ 3	904,180	(113,956)	(27,304)
Beginning balance (in shares) at Mar. 31, 2024		56,912,000	26,084,000
Net Income (Loss)	(5,147)				(5,147)
Issuance of common stock for acquisitions	516			516
Issuance of common stock for acquisitions (in shares)		188,000
Settlement of convertible senior notes		797
Exercise of stock options	17,640			17,640
Exercise of stock options (in shares)		598,000
Vesting of restricted stock (in shares)		90,000
Conversion from Class B to Class A common stock		613,000	(613,000)
Stock-based compensation	17,355			17,355
Foreign currency translation, net of tax	(2,067)					(2,067)
Retirement related benefit plans, net of tax	81					81
Ending balance at Jun. 30, 2024	791,306	$ 5	$ 3	939,691	(119,103)	(29,290)
Ending balance (in shares) at Jun. 30, 2024		59,198,000	25,471,000
Net Income (Loss)	1,779				1,779
Issuance of common stock for acquisitions	3,429			3,429
Issuance of common stock for acquisitions (in shares)		36,000
Issuance of common stock for employee stock purchase program	4,586			4,586
Issuance of common stock for employee stock purchase program (in shares)		61,000
Exercise of stock options	6,773			6,773
Exercise of stock options (in shares)		160,000
Vesting of restricted stock (in shares)		24,000
Conversion from Class B to Class A common stock		39,000	(39,000)
Stock-based compensation	17,356			17,356
Foreign currency translation, net of tax	11,638					11,638
Retirement related benefit plans, net of tax	33					33
Ending balance at Sep. 30, 2024	$ 836,900	$ 5	$ 3	$ 971,835	$ (117,324)	$ (17,619)
Ending balance (in shares) at Sep. 30, 2024		59,518,000	25,432,000