Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member] Class A Common Stock [Member]	Common Stock [Member] Class B Common Stock [Member]	Additional Paid-In Capital [Member]	Additional Paid-In Capital [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated Deficit [Member]	Accumulated Deficit [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning balance at Dec. 31, 2021	$ 613,197		$ 5	$ 3	$ 724,226		$ (102,087)		$ (8,950)
Beginning balance (in shares) at Dec. 31, 2021			51,524,000	27,745,000
Net (loss) income	11,528						11,528
Issuance of common stock for employee stock purchase program	4,187				4,187
Issuance of common stock for employee stock purchase program (in shares)			77,000
Exercise of stock options	238				238
Exercise of stock options (in shares)			86,000
Vesting of restricted stock (in shares)			324,000
Stock-based compensation	19,403				19,403
Foreign currency translation, net of tax	(4,163)								(4,163)
Retirement related benefit plans, net of tax	105								105
Ending balance at Mar. 31, 2022	618,425	$ (26,070)	$ 5	$ 3	698,045	$ (50,009)	(66,620)	$ 23,939	(13,008)
Ending balance (in shares) at Mar. 31, 2022			52,011,000	27,745,000
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 (loss) income	(1,959)						(1,959)
Issuance of common stock for acquisitions (in shares)			34,000
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
Payments for repurchase of common stock	(4,256)				(4,256)
Payments for repurchase of common stock, Shares			(91,000)
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