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, 2017	$ 873,918	$ 33,727	$ (37,768)	$ 386,338	$ 532,687	$ (83,480)	$ 831,504	$ 42,414
Common stock shares beginning at Dec. 31, 2017		50,587,000	(1,457,000)
Total comprehensive income	67,279				74,502	(8,118)	66,384	895
Noncontrolling interests	4,209							4,209
Dividends to noncontrolling interest	(2,735)							(2,735)
Common stock issued for share-based plans	4,861	$ 706		4,155			4,861
Common stock issued for share-based plans, shares		1,061,000
Share-based compensation	15,975			15,975			15,975
Tax related to net share settlement	(11,056)			(11,056)			(11,056)
BALANCE at Sep. 30, 2018	952,451	$ 34,433	$ (37,768)	395,412	607,189	(91,598)	907,668	44,783
Common stock shares ending at Sep. 30, 2018		51,648,000	(1,457,000)
BALANCE at Jun. 30, 2018	922,815	$ 34,204	$ (37,768)	391,332	576,280	(81,633)	882,415	40,400
Common stock shares beginning at Jun. 30, 2018		51,303,000	(1,457,000)
Total comprehensive income	21,246				30,909	(9,965)	20,944	302
Noncontrolling interests	4,209							4,209
Dividends to noncontrolling interest	(128)							(128)
Common stock issued for share-based plans	1,852	$ 229		1,623			1,852
Common stock issued for share-based plans, shares		345,000
Share-based compensation	4,896			4,896			4,896
Tax related to net share settlement	(2,439)			(2,439)			(2,439)
BALANCE at Sep. 30, 2018	952,451	$ 34,433	$ (37,768)	395,412	607,189	(91,598)	907,668	44,783
Common stock shares ending at Sep. 30, 2018		51,648,000	(1,457,000)
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	50,221,035	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	51,012,794	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	51,012,794	52,470,000	(1,457,000)