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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net Income (Loss) Attributable to Parent	$ 3,806,267	$ 1,758,675	$ 365,614
Foreign currency translation adjustments	371,057	(36,953)	(112,857)
Other post-employment benefits adjustments, net of tax	(3,806)	(7,363)	7,549
Net unrealized holding gains on available-for-sale investments, net of tax	2,553	3,926	(1,187)
Other comprehensive income, net of tax	369,804	(40,390)	(106,495)
Comprehensive income attributable to Bio-Rad	$ 4,176,071	$ 1,718,285	$ 259,119

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