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	31,435				41,201	(10,353)	30,848	587
Acquisition/Net changes in noncontrolling interests	(6,153)			(1,225)			(1,225)	(4,928)
Contributions from noncontrolling interests	11,776							11,776
Dividends to noncontrolling interests	(1,552)							(1,552)
Common stock issued for share-based plans	1,065	$ 278		787			1,065
Common stock issued for share-based plans, shares		418,000
Share-based compensation	11,678			11,678			11,678
Deferred compensation plan			$ (892)	892
Deferred compensation plan, shares			(26,000)
Tax related to net share settlement	(5,405)			(5,405)			(5,405)
BALANCE at Jun. 30, 2020	1,195,627	$ 35,389	$ (38,660)	433,989	831,159	(118,492)	1,143,385	52,242
Common stock shares ending at Jun. 30, 2020		53,082,000	(1,483,000)
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 beginning at Mar. 31, 2020		52,932,000	(1,481,000)
Total comprehensive income	12,368				21,033	(9,020)	12,013	355
Acquisition/Net changes in noncontrolling interests	(6,153)			(1,225)			(1,225)	(4,928)
Contributions from noncontrolling interests	999							999
Dividends to noncontrolling interests	(1,444)							(1,444)
Common stock issued for share-based plans	1,065	$ 100		965			1,065
Common stock issued for share-based plans, shares		150,000
Share-based compensation	7,441			7,441			7,441
Deferred compensation plan			$ (203)	203
Deferred compensation plan, shares			(2,000)
Tax related to net share settlement	(938)			(938)			(938)
BALANCE at Jun. 30, 2020	1,195,627	$ 35,389	$ (38,660)	433,989	831,159	(118,492)	1,143,385	52,242
Common stock shares ending at Jun. 30, 2020		53,082,000	(1,483,000)
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	$ 116,944				94,826	17,765	112,591	4,353
Acquisition/Net changes in noncontrolling interests	3,985			(22)			(22)	4,007
Dividends to noncontrolling interests	(250)							(250)
Common stock issued for share-based plans	2,103	$ 306		1,797			2,103
Common stock issued for share-based plans, shares		458,000
Share-based compensation	14,138			14,138			14,138
Deferred compensation plan			$ (218)	218
Deferred compensation plan, shares			(3,000)
Tax related to net share settlement	(10,046)			(10,046)			(10,046)
BALANCE at Jun. 30, 2021	$ 1,142,997	$ 35,998	$ (336,128)	455,683	982,872	(55,841)	1,082,584	60,413
Common stock shares ending at Jun. 30, 2021	44,730,897	53,994,000	(9,263,000)
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 beginning at Mar. 31, 2021		53,860,000	(9,260,000)
Total comprehensive income	74,409				55,374	15,783	71,157	3,252
Acquisition/Net changes in noncontrolling interests	2,982			(18)			(18)	3,000
Dividends to noncontrolling interests	(250)							(250)
Common stock issued for share-based plans	1,259			1,259			1,259
Share-based compensation	8,370	$ 90		8,280			8,370
Share-based compensation, shares		134,000
Deferred compensation plan			$ (218)	218
Deferred compensation plan, shares			(3,000)
Tax related to net share settlement	(753)			(753)			(753)
BALANCE at Jun. 30, 2021	$ 1,142,997	$ 35,998	$ (336,128)	$ 455,683	$ 982,872	$ (55,841)	$ 1,082,584	$ 60,413
Common stock shares ending at Jun. 30, 2021	44,730,897	53,994,000	(9,263,000)