Revenue, Gross Profit and Operating Income (Loss) by Reportable Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenue	$ 706,793	$ 590,623	$ 626,099
Gross Profit	300,328	244,517	262,085
Operating Income (Loss)	64,054	55,888	55,282
Operating Segments | Photonics
Segment Reporting Information [Line Items]
Revenue	232,459	199,613	230,457
Gross Profit	107,993	89,060	105,845
Operating Income (Loss)	46,792	34,001	41,990
Operating Segments | Vision
Segment Reporting Information [Line Items]
Revenue	262,060	261,650	271,407
Gross Profit	100,890	100,267	105,228
Operating Income (Loss)	17,694	16,354	21,007
Operating Segments | Precision Motion
Segment Reporting Information [Line Items]
Revenue	212,274	129,360	124,235
Gross Profit	99,345	58,279	53,326
Operating Income (Loss)	52,676	31,663	22,339
Unallocated Corporate and Shared Services
Segment Reporting Information [Line Items]
Gross Profit	(7,900)	(3,089)	(2,314)
Operating Income (Loss)	$ (53,108)	$ (26,130)	$ (30,054)