CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Total Diodes Incorporated Stockholders' Equity	Noncontrolling Interest
BALANCE at Dec. 31, 2019	$ 1,152,783	$ 35,111	$ (37,768)	$ 427,262	$ 789,958	$ (108,139)	$ 1,106,424	$ 46,359
Common stock shares beginning at Dec. 31, 2019		52,664,000	(1,457,000)
Total comprehensive income	19,067				20,168	(1,333)	18,835	232
Contributions from noncontrolling interests	10,777							10,777
Dividends to noncontrolling interest	(108)							(108)
Common stock issued for share-based plans		$ 178		(178)
Common stock issued for share-based plans, shares		268,000
Share-based compensation	4,237			4,237			4,237
Stock buyback related to deferred compensation plan			$ (689)	689
Stock buyback related to deferred compensation plan, shares			(24,000)
Tax related to net share settlement	(4,467)			(4,467)			(4,467)
BALANCE at Mar. 31, 2020	1,182,289	$ 35,289	$ (38,457)	427,543	810,126	(109,472)	1,125,029	57,260
Common stock shares ending at Mar. 31, 2020		52,932,000	(1,481,000)
BALANCE at Dec. 31, 2020	$ 1,016,123	$ 35,692	$ (335,910)	449,598	888,046	(73,606)	963,820	52,303
Common stock shares beginning at Dec. 31, 2020	44,276,194	53,536,000	(9,260,000)
Total comprehensive income	$ 42,535				39,452	1,982	41,434	1,101
Net changes in noncontrolling interests	1,003			(4)			(4)	1,007
Common stock issued for share-based plans	754	$ 216		538			754
Common stock issued for share-based plans, shares		324,000
Share-based compensation	5,858			5,858			5,858
Tax related to net share settlement	(9,293)			(9,293)			(9,293)
BALANCE at Mar. 31, 2021	$ 1,056,980	$ 35,908	$ (335,910)	$ 446,697	$ 927,498	$ (71,624)	$ 1,002,569	$ 54,411
Common stock shares ending at Mar. 31, 2021	44,600,001	53,860,000	(9,260,000)