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, 2018	$ 977,432	$ 34,454	$ (37,768)	$ 399,915	$ 636,708	$ (101,846)	$ 931,463	$ 45,969
Common stock shares beginning at Dec. 31, 2018		51,678,000	(1,457,000)
Total comprehensive income	80,702				106,060	(25,859)	80,201	501
Noncontrolling interests	3,343							3,343
Dividends to noncontrolling interest	(2,568)							(2,568)
Common stock issued for share-based plans	7,208	$ 528		6,680			7,208
Common stock issued for share-based plans, shares		792,000
Share-based compensation	15,364			15,364			15,364
Tax related to net share settlement	(4,383)			(4,383)			(4,383)
BALANCE at Sep. 30, 2019	1,077,098	$ 34,982	$ (37,768)	417,576	742,768	(127,705)	1,029,853	47,245
Common stock shares ending at Sep. 30, 2019		52,470,000	(1,457,000)
BALANCE at Jun. 30, 2019	1,051,152	$ 34,803	$ (37,768)	414,451	704,708	(112,225)	1,003,969	47,183
Common stock shares beginning at Jun. 30, 2019		52,202,000	(1,457,000)
Total comprehensive income	22,642				38,060	(15,480)	22,580	62
Common stock issued for share-based plans	503	$ 179		324			503
Common stock issued for share-based plans, shares		268,000
Share-based compensation	5,589			5,589			5,589
Tax related to net share settlement	(2,788)			(2,788)			(2,788)
BALANCE at Sep. 30, 2019	1,077,098	$ 34,982	$ (37,768)	417,576	742,768	(127,705)	1,029,853	47,245
Common stock shares ending at Sep. 30, 2019		52,470,000	(1,457,000)
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	51,206,969	52,664,000	(1,457,000)
Total comprehensive income	$ 80,208				68,353	11,034	79,387	821
Acquisition of non-controlling interest	(6,153)			(1,225)			(1,225)	(4,928)
Contributions from noncontrolling interests	11,779							11,779
Dividends to noncontrolling interest	(1,553)							(1,553)
Common stock issued for share-based plans	4,397	$ 517		3,880			4,397
Common stock issued for share-based plans, shares		775,000
Share-based compensation	17,833			17,833			17,833
Deferred compensation plan			$ (1,437)	1,437
Deferred compensation plan, shares			(37,000)
Tax related to net share settlement	(8,243)			(8,243)			(8,243)
BALANCE at Sep. 30, 2020	$ 1,251,051	$ 35,628	$ (39,205)	440,944	858,311	(97,105)	1,198,573	52,478
Common stock shares ending at Sep. 30, 2020	51,945,299	53,439,000	(1,494,000)
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 beginning at Jun. 30, 2020		53,082,000	(1,483,000)
Total comprehensive income	48,773				27,152	21,387	48,539	234
Contributions from noncontrolling interests	2							2
Common stock issued for share-based plans	3,332	$ 239		3,093			3,332
Common stock issued for share-based plans, shares		357,000
Share-based compensation	6,155			6,155			6,155
Deferred compensation plan			$ (545)	545
Deferred compensation plan, shares			(11,000)
Tax related to net share settlement	(2,838)			(2,838)			(2,838)
BALANCE at Sep. 30, 2020	$ 1,251,051	$ 35,628	$ (39,205)	$ 440,944	$ 858,311	$ (97,105)	$ 1,198,573	$ 52,478
Common stock shares ending at Sep. 30, 2020	51,945,299	53,439,000	(1,494,000)